The Many Faces of Resource Guarding

One of my AutumnGold instructors recently completed a set of in-home lessons with a couple and their young Vizsla. The dog, Sadie, had completed our puppy class last summer and her owners were interested in working on in-home manners. One of the behaviors that Amanda, the instructor, included was target training “go to your mat and down/stay”. We use several approaches to teach this at AutumnGold, one of which employs a remote treat-delivery device such as a Manners Minder or Pet Tudor (see “Manners Minder and Me” for details).

Ally and Treat & Train 2

TEACHING ALLY “TABLE’ USING A MANNERS MINDER

The owners were interested a remote trainer, so Amanda borrowed our device so that they could try it for a few weeks. Sadie responded beautifully and rapidly, but unfortunately, just as rapidly developed another behavior – resource guarding.  She learned to stay on her bed and enjoyed the random delivery of treats, but when her owners approached, Sadie began to freeze over the Manners Minder, growling if they came too close.

Oops.

Prior to the start of the lessons, Sadie’s owners had not identified resource guarding as a problem. However, during their first meeting, Amanda noticed that Sadie stiffened slightly after she gave her a stuffed Kong. This was quickly diffused by teaching Sadie to “make a trade” and Amanda saw no other signs during that lesson. When questioned further, the owners did say that they sometimes saw similar body postures when Sadie was approached while eating. Amanda talked with them about the body language signs of resource guarding and cautioned them to watch for similar signs (or an escalation) after introducing the Manners Minder to Sadie. And sure enough…..there it was.

Amanda is a skilled trainer and quickly intervened with a behavior modification program to prevent and treat Sadie’s resource guarding. However, what Amanda and I found interesting about this episode was that the owners had not previously mentioned a specific problem with resource guarding to Amanda. Granted this is a young dog, the initial guarding behavior was subtle and there was no bite history. Still, we wondered, was this because the owners had not been consciously aware of Sadie’s stiffening body posture previously or that they had noticed it but were not sure that it implied a problem?

Identifying resource guarding: Most dog owners think of resource guarding as overt aggression (and certainly that is how it manifests at its most severe). Additionally, rather than being viewed as a general pattern of behavior, owners typically report the specific items that are guarded;  i.e. “she is not good around her food bowl” or “he does not like being approached when he is chewing on his favorite bone“. However, there can be several more nuanced signs that suggest a dog may be highly invested in toys, a food bowl or a resting spot. These include becoming “still”  (stiffening/freezing), abruptly changing body position to block access, hiding or running away, or rapidly ingesting food (or a stolen item) when approached. It is these more subtle signs that may be unnoticed or misconstrued, and that in some cases might be precursors of later aggression.

foodbowlguarding3

NOT THE ONLY FACE OF RESOURCE GUARDING

Do we notice other signs? The question of how much attention dog owners generally pay to the other faces of resource guarding was recently examined by a team of researchers at the University of Guelph in Canada.

The Study: They asked a group of almost 1500 dog owners to view short video clips that portrayed dogs who were approached near their food bowl or when chewing on a rawhide chew toy. For each clip, participants were asked to classify the behavior that they viewed into one of these five categories: Aggression (snaps, bites or attempts to bite); Threat (freezing, stiff or tense body posture, hard stare or growl); Avoidance (moves head away and actively avoids removal of item, runs away with item); Rapid Ingestion (increases speed of ingestion, gulps at food rapidly); or No Resource Guarding (relaxed, loose, wiggly body posture).  Each of the behavior categories had been previously validated by a team of behavior experts.

Results: Several interesting findings were reported:

  • Perhaps not surprisingly, the participants, all dog owners, were highly capable of correctly identifying overt aggressive behavior associated with resource guarding. They were similarly adept at knowing when a dog was relaxed and friendly and showed no signs of guarding behavior.
  • Conversely, owners were less likely to correctly identify the more subtle signs of resource guarding such as avoidance, rapid ingestion and even threatening behaviors (freezing and staring).
  • When the three types of non-aggressive behaviors were compared, owners were better able to recognize threatening behavior than they were to recognize avoidance or rapid ingestion. The authors speculated that owners are more sensitive to behaviors that they think of as being potentially threatening than those that appear to be benign, such as running away or eating rapidly.

Take Away for Dog Folks

At AutumnGold, our potential clients complete a four-page behavior profile form for their dog prior to being admitted into class. The form includes questions about their dog’s behavior during mealtime, around their food bowl, with toys and when resting. It is not unusual to receive profiles that report  dogs who run away or avoid interactions with high-value toys, or who becoming still/stiff when approached while eating or resting in a favorite spot. We always respond to these applications with a phone consultation. In some cases the avoidance behavior is simply a (learned) game of “catch me if you can” or the avoidance that the owner reports is just an untrained dog who has not been taught to come when called. However, is some cases, we identify these behaviors as a form of resource guarding and are able to intervene and provide early guidance.

The results of this research suggest that many owners perceive the more subtle forms of resource guarding as being harmless or inconsequential, or they do not notice them at all. For professional trainers, this information encourages us to better understand the perspectives of clients and to proactively teach owners to identify and understand some of the more subtle body language signs in their dogs before they develop into aggressive responses.

As for Sadie, she learned to go to her mat reliably using clicker training and polished up her “sit for greeting” behavior to control her very exuberant personality with visitors. Amanda also provided Sadie’s people with a set of canine body posture handouts and discussed the implications of stillness, freezing and avoidance behaviors in dogs. Sadie’s owners were highly interested in this information and rapidly became talented “dog behavior sleuths” with their girl, recognizing situations in which Sadie felt compelled to guard and managing her life to avoid or prevent those settings. Her owners also regularly practice “make a trade” and “give” with Sadie for all types of items (not just those that are high-value) so that she learns to happily give up toys and other items without becoming stressed or defensive.

All-in-all a happy outcome, with everyone benefiting from this type of research and its application to evidence-based training!

Cited Study: Jacobs JA, Pearl DL, Coe JB, Widowski TM, Niel L. Ability of owners to identify resource guarding behavior in the domestic dog. Applied Animal Behaviour Science 2017; In Press.

(Field) Dogs on the Beach

Mike and I and our dogs just returned from a week in Florida at a beach community that prides itself on its dog-friendliness. We met our friends Bob and Karen from Virginia, who brought their two Labs, Gus and Sally.

It was an amazing week. We spent hours with the dogs walking the beach, watching shorebirds and dolphins, hiking local trails, and visiting a nearby island preserve that is home to a pair of endangered Red Wolves (no sighting of those, but Bob and Mike did see a Bobcat while out cycling one afternoon).  A perfect winter get-away for all of us.

linda-mike-karen-dogs-on-beach

WALKING THE BEACH WITH TWO GOLDENS, TWO LABS, A TOLLER AND A BRITTANY.

The Dogs: Our four dogs included Chippy (Toller), Vincent (Brittany), and Alice and Cooper (Golden Retrievers). Ally and Cooper are field-bred, from Jackie Mertens of Topbrass Retrievers. We have a 30-year history with Jackie’s dogs and love their athleticism, spirit, and boundless exuberance. They fit with our lifestyle and are a joy to live with and to train. Karen’s two Labs are also from field lines. Sally comes from Cresthill Kennels and Gus from Southland Kennels. Like us, Karen and Bob are active folks who spend a lot of time outdoors with their dogs. They have the added good fortune of living near the water and so they enjoy swimming, retrieving and boating regularly with their dogs.

Field-bred? As many readers know, the Golden Retriever and Labrador Retriever are closely related breeds that were originally created to aid hunters by retrieving game – most commonly water fowl. As a result, they are highly active dogs that love to swim and to retrieve. As the general story goes, both breeds experienced an increase in popularity as family pets during the 1970’s. Because the attributes of a family companion are not always in line with the behaviors one seeks in a hunting dog, the breeds began to experience a divergence in selection criteria, with some dogs bred for their hunting ability and others for conformation and a more easy-going temperament. Over several generations, this resulted in two distinct  types within each breed. Although there is certainly overlap and some purposeful outcrossing between the two types, the term field-bred refers to dogs born within pedigree lines that are selected specifically for hunting ability, while conformation/pet refers to those selected for conformation and suitability as family companions.

Do field-bred dogs behave similarly across breeds? Karen and I had many great dog training conversations during our time together. One topic that interested us was the similarities and differences that we observed between field-bred Labs (her dogs) and field-bred Goldens (my dogs). Similarities included a love of retrieving and apparently inexhaustible energy level. All four dogs are intensely focused on retrieving and will chase toys and bumpers until the sun goes down (and comes back up again). Similarly, all are highly active (an understatement). Alice is known for “orbiting” – circling around us  in wide arcs, veering off on each loop to splash through the surf.  A typical 5-mile hike for us meant at least 10 miles for Ally. Similarly, Gus only slowed down when he fell asleep in his crate at the end of the day and Sally clearly has no understanding of the statement “this is your final retrieve“.

What about differences? A major difference that we observed, and something that will not surprise Lab folks, is that Karen’s dogs were more physically robust than my Goldens. While my guys love to chase and wrestle as they play, the Lab version of this involves a lot more body-slamming and chest-bumping (a play style that Alice made abundantly clear to Gus that she had no interest in participating in).

These were just a few observations from our dog days on the beach.  And of course, they may simply reflect similarities and differences of our four individual dogs. This was an “n of 2” for each breed, after all. Hardly a representative sample.

beach-with-karen-bob-and-dogs

FINAL MORNING ON THE BEACH

So……upon returning home, my immediate Science Dog query was naturally:

Is there any research that compares the behavior of Golden Retrievers and Labrador Retrievers?”

Well yes Virginia, as a matter of fact, there is.

In 2016, a team of behavioral geneticists led by Dr. Pers Jensen at Linköping University in Sweden compared Dog Mentality Assessment (DMA) test scores of Labrador and Golden Retrievers (1). The DMA is a standardized and validated behavior profile that is administered by the Swedish Working Dog Club. The researchers’ objectives were to examine behavioral differences between field and conformation/pet lines of Golden retrievers and Labrador Retrievers. They hypothesized that because selection criteria were the same, that the behaviors of field-bred dogs in each breed would be similar. They collected DMA scores and pedigrees for 902 Golden Retrievers (204 field dogs and 698 conformation/pet dogs) and for 1672 Labrador Retrievers (1023 and 649). A statistical test called Principal Component Analysis (PCA) was used to identify a set of six primary behavior categories: curiosity, play interest, chase proneness, social curiosity, social greeting and threat display. Results were compared between both breeds and breed types, and pedigrees were used to compute heritability estimates for the behavior categories.

Results: Although the hypothesis was that similar selection criteria (hunting ability) would result in similar behavior patterns in Labrador and Golden Retrievers (two closely related breeds), the researchers actually found several significant differences between field-bred Goldens and Labs:

  1. Labradors vs. Goldens: When compared overall (combining types), Labrador Retrievers scored higher in curiosity, play interest and threat display compared with Golden Retrievers. Golden Retrievers, on the other hand, scored higher in chase behavior, social curiosity and social greeting.
  2. Field-bred vs. Conformation/pet: Within-breed comparisons showed that field-bred dogs scored higher in playfulness than their non-field cohorts in both Goldens and Labs. Other than this similarity however, there were several breed-specific differences (statistically speaking, this is called an interaction effect of breed and type).
    • Field-bred Labrador Retrievers were less socially curious and less interested in social greeting than their conformation and pet-bred counterparts. These results are in agreement with a 2014 study of hunting Labs (2).
    • In contrast, field-bred Golden Retrievers were more curious and more likely to show social greeting behavior than their conformation/pet cohorts. Field-bred Goldens also had a stronger chase (retrieve) response than conformation/pet Goldens.
  3. Heritability estimates: Analysis reflected substantial (moderate to high) genetic influence on the behavioral traits that were measured, in both breeds. However, results suggest that the genetic influences (called genetic architecture) underlying hunting ability in Labs vs. Goldens may be different.

Despite similar genetic origins and intense selection for the same type of work (retrieving birds), field-bred Labradors and Goldens demonstrate distinct behavioral differences. Most notably, field Goldens seem to be more highly social and more socially curious than other types of Goldens, while field-bred Labradors do not demonstrate this enhanced sociability. Equally striking is the evidence that the set of genes in Goldens and Labs that influence hunting ability are not identical and suggested different selective pressures and underlying genetic influences in the two breeds.

Take Away for Dog Folks

These results provide some helpful information to trainers, veterinarians and other pet professionals who regularly advise their clients regarding breed selection. First (and I know this is a no-brainer for those of you who live with these breeds)……a Golden is not a Labrador (and vice versa)…….  Second, a field Golden/Lab is not a conformation Golden/Lab (also obvious)…… And finally, a field-bred Golden is also not a field-bred Lab (less obvious). Even though field-bred Golden retrievers and Labrador Retrievers have been intensely selected for the exact same job over many generations, they still turn out, well, different (ain’t nature something?).

Practically speaking, a field-bred Labrador Retriever should be expected to be highly focused (i.e. less socially curious) and intensely playful (remember – they are the rough-and-tumble guys), and may have a higher propensity to threat responses than a Golden Retriever. And, if you go for the field-bred Golden type, expect a social butterfly who zips around at 100-miles-an-hour (Ally would be happy to demonstrate).

ally-jumping-in

ALLY DOES EVERYTHING FAST. INCLUDING CANNON-BALLING HER BROTHERS.

Most importantly, if you are considering one of these breeds (or types), find and trust a breeder with experience who knows his/her lines. The current research suggests that the behavior traits that were measured in the Goldens and Labs were moderately to highly heritable. A reputable breeder who knows her pedigrees is also going to understand how the temperaments and behavior of her dogs carry from one generation to the next and will advise her puppy buyers accordingly. For me personally, I am thankful for having met Jackie and her co-breeder, Paige, who know their Topbrass Goldens inside and out and who over the years have allowed us to have so many amazing dogs share their lives with us.

Happy Training!

Cited Studies:

  1. Sundman AS, Johnsson M, Wright D, Jensen P. Similar recent selection criteria associated with different behavioural effects in two dog breeds. Genes, Brain and Behavior 2016; 15:750-756.
  2. Lofgren SE, Wiener P, Blott SC, Sanchez-Molano E, et al. Management and personality in Labrador Retriever dogs. Applied Animal Behavior Science 2014; 156:44-53.

 

 

Consider the (Caregiver) Placebo Effect

Most people are familiar with the concept of a “placebo effect”, the perception of improved health while unknowingly receiving a sham (placebo) treatment that in reality should have no benefit at all. Growing up, my mother referred to this as “giving someone a sugar pill”. The assumption is that because we believe that we are receiving an actual treatment, our mind tells us that we should feel a bit better. Then amazingly, we do feel better. We notice a reduction in symptoms and ultimately conclude that the “medicine” must be working. The irony is that placebos actually can be powerful medicine (or something), at least for some people, for some diseases, some of the time.

placebo-comic

Placebos and Us: The effects of placebos in human medicine are well-documented and are described with human diseases of almost every type. The highest level of placebo effect is seen with diseases that have subjective symptoms that are patient-reported and difficult to measure directly, that tend to fluctuate in severity, and that occur over long periods of time (i.e. are chronic). Examples include depression, anxiety-related disorders, gastric ulcer, asthma, and chronic pain. In medical research, an average placebo response rate of 35 percent is reported, with rates as high as 90 percent for some health conditions. By any standard, that is a whole lot of sugar pill response going on.

placebo

Placebo Control Groups: Although the reasons that we respond to placebos are not completely understood, medical researchers universally accept the importance of considering them when studying new treatments. Studies of new drugs or medical interventions include placebos as control groups to allow unbiased comparisons with the treatment or intervention that is being evaluated. Any effect that the placebo group shows is subtracted from the effect measured in subjects who are receiving the actual medication. The difference between the two is considered to be the degree of response attributable to the treatment. If a placebo control group was not included, it would be impossible to differentiate between a perceived response (placebo) and a real response to the treatment. Today, double-blind, placebo-controlled clinical trials are considered to be the Gold Standard of study designs by medical researchers. The “double-blind” part refers to the fact that in addition to having both a placebo group and a treatment group, neither the researchers nor the subjects know which subjects are getting the treatment and which are getting the placebo. (For more information about double-blind research trials with dogs, see “Thyroid on Trial“).

What about Dogs? Can a placebo effect occur with dogs? Possibly, but things work a bit differently where our dogs are concerned. Most obviously, while highly communicative in many ways, dogs cannot specifically tell us what part of their body is in pain, how intense that pain is, if it is abating, or by how much. Rather, we use our knowledge of a dog’s behavior and body language to determine how he is feeling. As their caregivers, we are the recorders and the reporters of our dogs’ health, symptoms, and response to treatments. Similar to human studies, this is most relevant when the symptoms are things that are not easily measured using medical tests and that are more subjective in nature.

A second important difference is that dogs are basically always blinded to treatments. Although they may understand that something different is being done to them (or that there is a strange pill buried in that piece of cheese), most people will agree that dogs do not have an understanding that they are being medicated for a particular health problem or are on the receiving end of a new behavior modification approach. As a result, unlike human patients, dogs lack the specific expectations and beliefs about health interventions that may be necessary for a placebo effect to occur directly. However, because it is the owner who reports many symptoms and changes in health to their veterinarian and also who conveys subjective information regarding the dog’s response to a given treatment, a different type of placebo effect may be in action with dogs. This is called a “caregiver placebo effect”. As with human maladies, the conditions for which this type of placebo effect has been described in dogs are those that involve subjective measures of health (pain, activity level, appetite) and that have a tendency to fluctuate in severity.

Let’s look at two examples – the caregiver placebo effect in dogs with osteoarthritis and in dogs with epilepsy.

Does Your Dog Hurt Less? Osteoarthritis is a painful and progressive health problem that can seriously impact a dog’s quality of life. A variety of medical and nutritional treatments are available today for afflicted dogs. These range from NSAIDS (ex. deracoxib, meloxicam), nutrient supplements (ex. glucosamine, chondroitin sulfate) to alternative medicine approaches (acupuncture, cold laser therapy). Researchers who have studied these treatments use subjective measures of lameness in which dogs’ owners and veterinarians numerically rate their dog’s degree of pain, mobility, and interest in daily activities in response to treatment. Some, but not all, studies also include objective measurements of arthritis that quantify the amount of weight-bearing in the affected legs and weight distribution in the body.

Arthritis Studies: In virtually all placebo-controlled studies of this type, a substantial proportion of owners and veterinarians have reported improvement in the placebo-treated dogs. However, when measured using weight-bearing techniques, the dogs in the placebo group showed no change in or a worsening of disease. Michael Conzemius and Richard Evans at the University of Minnesota’s College of Veterinary Medicine decided to quantify the actual magnitude of the placebo effect in this type of experimental trial (1). They analyzed the data from 58 dogs who were in the placebo control group of a large clinical trial that was testing the effectiveness of a new NSAID. All of the enrolled dogs had been diagnosed with osteoarthritis and had clinical signs of pain and changes in gait and mobility. This was a multi-centered design, which means that each dog’s own veterinarian conducted the bi-weekly evaluations of gait and lameness. Both owners and veterinarians completed questionnaires that measured whether the dog showed improvement, no change, or worsening of arthritis signs over a 6-week period. Neither the owners nor the veterinarians knew if their dog was receiving the placebo or the new drug.

Results: Half of the owners (50 percent) stated that their dog’s lameness decreased during the study, 40 percent reported no change, and 10 percent said that their dog’s pain had worsened. When these reports were compared with actual change as measured by force platform gait analysis, the caregiver placebo effect, (i.e. thinking that improvement occurred when there was either no change or an actual worsening of signs), occurred in 40 percent of owners. The veterinarians performed no better. A placebo effect occurred 40 to 45 percent of the time when veterinarians were evaluating dogs for changes in gait or pain. This means that not only were the owners strongly invested in seeing a positive outcome, so too were their veterinarians. This effect occurred despite the fact that all of the human participants were aware that their dog had a 50 percent chance of being in the placebo group or the drug group, and that there was no way to be certain which group their dog was in.

Seizure Study: This study used an approach called a “meta-analysis” which means that the researchers pooled and then reexamined data collected from several previous clinical trials (2). Veterinarians from North Carolina State University College of Veterinary Medicine and the University of Minnesota reviewed three placebo-controlled clinical trials that examined the use of novel, adjunct treatments for canine epilepsy. During the treatment period owners were asked to record all seizure activity, including the length of the seizure, its intensity, and the dog’s behavior before and immediately following the seizure. The pooled results showed that the majority of owners of dogs in the placebo group (79 %) reported a reduction in seizure frequency in their dog over the 6-week study period. Almost a third of the owners (29 %) said that there was a decrease of more than 50 percent, the level that was classified in the study protocols as indicative of a positive response to treatment.

What’s Going On? Well, several things, it appears. The most obvious explanation of the caregiver placebo effect in dogs is owner expectations of a positive response when they assume an actual treatment is being administered to the dog. Whenever we introduce a new medication or diet or training method and anticipate seeing an improvement in our dog’s health, nutritional well-being or behavior, we naturally tilt toward seeing positive results and away from seeing no change (or worse – a negative effect). This is a form of confirmation bias – seeing what we expect to see and that confirms our preexisting beliefs. In fact, an early study of the caregiver placebo effect in dogs found that when owners were asked to guess which group their dog was in, the owners who said that they were certain that their dog was in the treatment group (but was actually in the placebo group) demonstrated the strongest placebo effect (3).

Such expectations may be an especially strong motivator when we are dealing with maladies that have affected our dog for a long time, infringes upon the dog’s ability to enjoy life, and for which we feel that we are running out of options. Osteoarthritis and seizure disorders were the health conditions studied in these papers, but I can think of several other problems with our dogs for which we may easily succumb to the power of the placebo effect. These include chronic allergies, adverse reactions to food ingredients, anxiety-related behavior problems and even cancer.

Cognitive Dissonance: Another factor that may contribute to the caregiver placebo effect is finding oneself in a state of contradiction. When we invest time and money (and hope) into a new treatment for our dogs, it follows that we will naturally have high expectations that the treatment will work. Indeed if it does not, we may experience cognitive dissonance, the uncomfortable feeling caused by holding two contradicting beliefs in one’s mind at the same time. For example, “I was told that giving my dog dehydrated gooseberry rinds would cure his chronic itching; these rinds are expensive and hard to find. He does not seem any better…… Uh oh. This is not a good feeling….”

Psychologists tell us that our brain reduces this discomfort for us (without our conscious awareness, by the way) by simply changing our perceptions. “Oh look! I am sure that the dehydrated gooseberry rinds ARE finally working. It just too some time – several months in fact. Still the effect MUST be the gooseberry rinds. YAY!”  In this case, convincing oneself that the dog does seem a bit less itchy, her coat is a bit healthier and overall, she does really seem to be feeling better, immediately solves this problem for the brain and for our comfort level.

cognitive-dissonance

The Hawthorne Effect: Finally, a related phenomenon that is common enough to have earned its own name is the Hawthorne Effect, also called observation bias. This is the tendency to change one’s behavior (or in our case how one reports their dog’s behavior) simply as a result of being observed. The Hawthorne Effect suggests that people whose dogs are enrolled in an experimental trial may behave differently with the dog because they know they are enrolled in a trial that is measuring many aspects of the dog’s life. In the case of the arthritis studies, owners may have altered how regularly they exercised their dogs, avoided behaviors that worsened the dog’s arthritic pain, or began to pay more attention to the dog’s diet and weight.

The point is that when people are enrolled in a research trial or are starting a new medical treatment, diet, or training program and are being monitored, they will be inclined to change other aspects of how they live with and care for the dog as well. These changes could be as important (or more important) than the actual treatment (or placebo). This is not necessarily a bad thing, mind you, and is another reason why we always need control groups, but the occurrence of the Hawthorne Effect emphasizes the importance of recognizing that the thing that we think is working for our dog may not actually be the thing that is doing the trick.

Take Away for Dog Folks: When trying something new with our dogs, might we, at least some of the time, in some situations, be inclined to see improvement when it does not truly exist? When interpreting our dog’s response to a novel therapy or supplement or training technique are we susceptible to falling for the sugar pill? It seems probable, given the science. It is reasonable to at least consider the possibility that a placebo effect may be influencing our perceptions of our dog’s response to a new food, a new supplement, a new training technique or a novel treatment. This is especially true if the approach that we are trying has not been thoroughly vetted by research through double-blind, placebo-controlled trials. While the development of new medications and foods and training methods is exciting and important, we must avoid the tendency to see improvement from something that is novel simply because we expect and desire it to be so.

CITED STUDIES:

  1. Conzemium MG, Evans RB. Caregiver placebo effect of dogs with lameness from osteoarthritis. Journal of the American Veterinary Medical Association 2012; 241:1314-1319.
  2. Munana KR, Zhang D, Patterson EE. Placebo effect in canine epilepsy trials. Journal of Veterinary Internal Medicine 2010; 24:166-170.
  3. Jaeger GT, Larsen S, Moe L. Stratification, blinding and placebo effect in a randomized, double blind placebo-controlled clinical trial of gold bead implantation in dogs with hip dysplasia. Acta Veterinaria Scandinavica 2005; 46:57-68.

Excerpted from: “Beware the Straw Man: The Science Dog Explores Dog Training Fact and Fiction” (2015).

Beware Straw Man Cover

Happy New Year from The Science Dog! (The 2017 Pet Blogger Challenge)

Happy New Year from The Science Dog!

To start the year off, I am participating for the first time in The Pet Blogger Challenge that is organized by the travel site, Go Pet Friendly. Many thanks to my friend Eileen Anderson for alerting me to this annual event. Below are this year’s queries and my responses. I hope you enjoy learning a bit more about The Science Dog!

  1. When did you start your blog and, for anyone who is just seeing it for first time, please provide a description of your site. Would you say your blog focuses more on sharing stories with your readers, or providing a resource for your audience? Answer: I created The Science Dog in September of 2013, shortly before the publication of my fifth book, “Dog Food Logic“. The purpose of The Science Dog is to provide up-to-date, evidence-based information to dog folks and pet professionals about dog training, behavior and nutrition. My focus is primarily on original scientific research that has been published in peer-reviewed journals. I try to find studies whose results are relevant to trainers and dog owners and then summarize these in what I hope is a “user-friendly” style. Oh, and yeah, sometimes I editorialize a bit.

    soapbox

    GETTIN’ UP ON THE OL’ BOX

  2. What was your proudest blogging moment of 2016? Answer: I published the second Science Dog book in July of 2016, entitled “Only Have Eyes for You“. Both writing and promoting it has been a lot of fun! My husband Mike designed the cover for the book (as he did for “Beware the Straw Man“), and I was especially tickled that he used a photo of four of our dogs, posed in our garden. The oldest girl, Cadie, has since passed away, so this photo is very near and dear to my heart.

    Cadie Chip Vinny Cooper May 2013

    CHIPPY, VINNY, CADIE AND COOPER

  3. Which of your blog posts was your favorite this year and why? (Please include a link.) Answer: I enjoyed writing all of the posts, especially the nutrition essays, as I had focused the first two years of the blog on topics related to behavior and training. In 2015, I started to include more essays about nutrition and feeding practices. However, my personal favorite of 2016 has to be “The Perfect Dog“, because it reviews two recent papers that provide some insight into the gap between what people think a dog should be versus who dogs actually are (and also, to some degree, places the responsibility for this exactly where it lies).       Unrealistic Expectations
  4. Year after year, one goal that we all seem to share is that we want to reach more people. What one tool did you use or action did you take this year that had the most impact on increasing traffic to your blog? Answer: I use FaceBook quite a bit, and have a FB Science Dog page that gives dog folks access to the blog and allows readers to chat and to contact me directly. I love to hear from readers, especially when they have ideas for new science-based topics for the blog! (hint-hint).
  5. Which of your blog posts got the most traffic this year? (Please include a link.) Have you noticed any themes across your most popular posts? Answer: The essay that received the largest number of hits (~ 18,000) was “When Sit Doesn’t Mean S*it“. Catchy  little title aside, I think that it resonated with shelter professionals because it presents a set of research studies conducted by Alexandra Protopopova’s team that both challenged a prevailing belief about training and adoption rates and presented some unique solutions that may be more effective as predictors of dogs’ chances for adoption.   Sit Ubu
  6. What blog do you find most inspirational and how has it influenced your blog? (Please include a link.) Answer: There are a number of dog-related blogs that I follow regularly and enjoy. Two that are among the best are Eileen Anderson’s not-to-be-missed essays about dog training at EileenandDogs and Julie Hecht’s excellent research summaries at Dog Spies.
  7. What is one thing your readers don’t know about you or your pets that would surprise them? Answer: What my readers may not know (but all of my friends do) is that while I hold a Masters Degree in Canine/Feline Nutrition, I cannot cook a human food meal to save my life. I started volunteering two years ago at our local soup kitchen, The Daily Bread, and the other volunteers quickly learned this little secret. I am now a designated dish-washer and happily report that I excel at that particular task, keeping everyone safe (and well fed).

    daily-bread-people-2

    SUPPORT YOUR LOCAL SOUP KITCHEN! 

  8. What is something you’ve learned this year that could help other bloggers? Answer: Not to point any political fingers (interpret this as you like), but my advice to other writers (and citizens) is: Don’t lie and stick to the facts that have evidence to support them.    just-the-facts-maam-2
  9. What would you like to accomplish on your blog in 2017? Answer: The biggest challenge that I may have in 2017 is finding enough time to work on all of the writing and dog training projects that I am excited about. I am currently writing a new dog training book that presents evidence-based training and the applications that we use at our training school, AutumnGold, plus developing a few new training courses with several of AutumnGold’s instructors and writing essays for The Science Dog (many of which will appear, in some form, in the new book). Add in training and enjoying time with my own dogs, and it looks like it will be a busy and fun year!

    Cooper and Alice Standing Platforms

    PLATFORM TRAINING AT AUTUMNGOLD!

  10. Now it’s your turn! You have the attention of the pet blogging community – is there a question you’d like answered, or an aspect of your blog that you’d like input on? Answer: Thanks to GoPetFriendly for sponsoring this blog challenge and hop! This is a Blog Hop!

If Sit Doesn’t Matter, What Does?

My last Science Dog blog. “When Sit Doesn’t Mean S*it” reviewed a series of studies showing that training shelter dogs to sit on command is not as predictive of future adoption as was once assumed. Those results should not be interpreted as an argument against the benefits of training programs, but rather as evidence that there may be other factors involving shelter dogs, potential adopters and the shelter environment that may be more important to consider when looking at adoption rates and how to increase them.

Following the “sit” studies, Alexandra Protopopova and her research team set out to discover what, if anything, about dog-human visits might consistently predict adoption outcomes for dogs. They asked the question: “If sit doesn’t matter, what does?”.

What Matters: The researchers first studied 250 out-of-kennel visits between adoptable dogs and potential adopters at a municipal shelter in Florida (1). After selecting a dog to meet, shelter visitors interacted with dogs in either a small outdoor area, a larger, grassy outdoor area or a small indoor room. Multiple factors were examined during the interactions, including the dog’s appearance/breed/age, the dog’s behavior, and the visiting environment.  Results: Overall, three factors stood out as significant predictors of an individual dog’s likelihood of adoption following these visits. These were:

  1. Willingness to play: A negative relationship was found between not playing and adoption. Those dogs who ignored play initiation by visitors were less likely to be adopted than those who did not ignore the adopter’s invitation to play. The converse of this is that dogs who wanted to play with the potential adopters were more likely to be adopted after the interaction.
  2. Lying close: Dogs who voluntarily laid down close to the human visitor were much more likely to be adopted than those who did not. (14 times as likely, in fact!)
  3. Visiting space: Visits that took place in the small, outdoor area were more likely to lead to successful adoptions than were those that occurred in the large, enclosed grass area or in the indoor room.

lying-at-feet tug-of-war-with-person  LYING AT FEET AND ENGAGING IN PLAY ARE SIGNIFICANT PREDICTORS OF ADOPTION

What to do with this information? Here is where things get really cool. The researchers used the results from this study to design a simple program that could be used by shelters to improve adoption rates (2). And then, they tested the program to see if it  actually worked.  Science at its best.

Here is what they did:

Structured Interactions: The study included two experiments. In the first experiment, the researchers developed a play/toy preference assessment test and then used it to test the play preferences of 20 dogs. The dogs were retested several times over a period of three weeks to validate the accuracy of the tool. The second  experiment used a modified version of the play preferences assessment to identify the toy preferences of a larger group of dogs at the shelter. Following their play preference testing, the dogs were assigned to two groups: (1) A structured interaction group in which potential adopters interacted with the dog with his/her preferred toy and then engaged in petting while an experimenter encouraged (lured) the dog to lie quietly at the visitors feet or (2) A control group in which the dog’s play preferences were not revealed and whose interactions with the potential adopter were unstructured. (Details of the play preference test and the structure interactions format are included in the paper).  Data were collected on a total of 160 dog-adopter interactions.

Results: In the first experiment, play preference as measured by toy selection (tennis ball, nylon squeaky toy, cotton plush toy or flannel rope toy) was validated. This means that dogs who showed a preferred toy during the initial, short assessment continued to show the same preference when retested multiple times. However, it is significant to note that about one-third of the dogs (35 %) were not interested in playing with toys at all. (This is a point that the experimenters return to and address later). The import of this test lies more in the observation that simply asking dogs what type of toy that they preferred was helpful during future interactions, as found in the results of the second experiment. When the Structured Interaction group was compared with the Control group, striking differences emerged:

  1. Dogs in the structured interactions group (offered their preferred toy, encouraged to lie down at the visitor’s feet) spent less time ignoring the visitor’s invitations to play and more time in close proximity to the visitor.
  2. Dogs  in the structured interactions group were also significantly more likely (2.5 times more likely, in fact!) to be adopted than were the control dogs.
  3. The duration of the interactions did not differ between the two groups, suggesting that using structured interactions did not take additional staff or volunteer time than traditional visits. In addition, results of a post-interaction questionnaire revealed that the visitors did not find the format of the structured interaction to be intrusive or to interfere with their ability to visit with the dog.

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Take Away for Dog Folks

There are numerous ways in which this new information may be used to help shelter dogs. The initial set of studies showed that contrary to popular belief, teaching a dog to sit does not increase his or her chance for adoption (though it very well may have other benefits). Additionally, while multiple studies have shown that a dog’s appearance is one of the strongest factors that people use when initially selecting a dog (even though people tend to deny this when asked), appearance was not found to be important during subsequent out-of-kennel visits. Rather, during the actual visit with the dog, potential adopters react more to the dog’s play behavior and tendency to stay in close proximity (lying at feet) when making their adoption decision.

Let’s first look at play behavior: The use of the play preference test in this study is in-line with our increasing understanding of the welfare and emotional health benefits seen when we allow dogs to demonstrate their preferences and even better, to have a choice. This has become a bit of a buzz-word among trainers, but hyperbole and anecdotes aside, there is really nothing not to love about a shelter dog being allowed to choose his or her favorite toy and then carrying that toy into meet-and-greet areas for play with a new visitor.

Of course, nothing will be 100 percent effective or helpful. One of the caveats of the toy preference work was the finding that not all of the dogs in the shelter were interested in playing with toys. (I am sure this is not news to shelter staff). Of the dogs tested in the 2016 study,  only about 2/3 could be easily enticed to play with a toy, regardless of the toy type. This finding is consistent with previous shelter dog studies that reported that only a minority of dogs played with toys and that object-play is often of very short duration. This may occur because of the stress of the shelter environment, an individual dog’s previous history (i.e. never having had toys or opportunities to learn to play) or a combination of factors.

For those of us who live with toy (and play) maniacs, this might be surprising to learn.

chip-with-toys

LIKE ALL OF MY DOGS, CHIPPY LOVES HIS TOYS

Still, it is very helpful information. Knowing that dogs who willingly play with visitors are more often adopted and that a substantial number of shelter dogs may be reluctant to play with toys can lead shelters to develop their own innovative programs to encourage play behaviors in dogs. This may include different types of toys such as food puzzles or encouraging more “people-oriented” types of play (more about this in the next blog piece).

Second, lying in proximity:  In the structured interactions group, the researchers placed the dog on lead and then used a food lure to encourage the dog to stay close and/or to lie down near the visitor. While one could argue that this behavior was not voluntary and might not reflect a truly calm dog, helping a dog to focus on relaxing and to enjoy petting would allow the visitor to experience the dog while he or she is calm and quiet in a setting that is often not conducive to calm behavior in shelter dogs. In addition, this type of relaxation training is common in many dog training programs (including my own) and can be used as a way to classically condition dogs to remain calm and enjoy handling and petting. For shelters with training programs, this information suggests that training dogs to “lie at feet in a natural environment” might be an especially important exercise to emphasize.

Last, what I personally love best about this research is that it shows science working in the very best way that it can work – first to discover new knowledge, second to create a new approach or program from that knowledge, and third to test (and in this case confirm) the validity of the new program. In my view, a win-win for everyone involved – dogs, adopters and shelter professionals.

Cited References:

  1. Protopopova A, Wynne CDL. Adopter-dog interactions at the shelter: Behavioral and contextual predictors of adoption. Applied Animal Behaviour Science , 2014; 157:109 – 116.
  2. Protopopova A, Brandifino M, Wynne CDL. Preference assessments and structured potential adopter-dog interactions increase adoptions. Applied Animal Behaviour Science , 2016;176:87-95.

 

 

“Only Have Eyes for You: Exploring Canine Research with The Science Dog” – Kindle Edition Now Available!

The Kindle edition of Only Have Eyes for You: Exploring Canine Research with The Science Dog” is now available! Click on the image below for more information and to order.

Book description:  In her second Science Dog book, Linda Case tackles commonly held beliefs about canine nutrition, pet foods, behavior, social cognition and training. Each of the book’s 32 chapters explores a current issue that is of interest to dog owners and pet professionals and presents the scientific evidence that supports or refutes commonly held claims and beliefs. Learn about pet food ingredients and research showing that what is on the label may not always be in the food, about measures of food quality (and what consumers may not know about the foods that they buy), and about the safety and digestibility of popular dog treats and chews. Other chapters review new information regarding how dogs communicate, factors that help or inhibit a dog’s ability to learn, and the effectiveness of different types of training. Find out if dogs are capable of “knowing what someone else knows”, if they feel empathy for their friends, if they bark for no reason, and if they are capable of feeling guilt following a misdeed. Learn more about breed stereotyping, factors that influence our perceptions of dogs, and which canine characteristics most influence our attraction to particular dogs. This newest Science Dog book has something for everyone who works with and trains dogs, as well as for those who simply love dogs and enjoy learning more about our canine best friends.

                                                                             ♥♥♥♥♥♥♥♥♥♥♥♥♥♥

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Pretty in Pink

Our youngest dog, Ally, has a ‘bestie”. Her name is Colbie and she belongs to our friend Amanda, a trainer who also works as an instructor at AutumnGold. Ally is a Golden Retriever. Colbie is a Pit Bull Terrier, adopted from our local shelter while Amanda was on staff there.

Ally and Colbie Chasing

ALLY AND HER BEST FRIEND, COLBIE HAVE A PLAY DATE

Being young girls, both Ally and Colbie wear pink collars, Gentle Leaders and harnesses. For Ally, this is simply a fashion statement. For Colbie, given her breed and the breed-stereotypes that she may encounter, it means a bit more. Amanda purposefully dresses Colbie in pink hoping that such feminine attire will present Colbie as the sweetheart that she is. (Being color-blind, Colbie has no opinion).

Ally and Colbie in Pink

PRETTY IN PINK

Although Ally does not care about Colbie’s genetic heritage (or that she wears pink), many people do. Breed stereotypes are pervasive and impact local and state breed-specific legislation (BSL), rental property regulations, and shelter decisions regarding adoption and euthanasia. BSLs in the US and UK specifically target Pit Bull Terriers and other bully-type breeds, and either ban ownership of these breeds outright or impose strict restrictions upon ownership. These laws are based upon the assumption that targeted breeds are inherently dangerous and that individuals of the breeds can be reliably identified. There is much controversy (and no consensus) regarding the first assumption and is a topic for another time. In this article, we look at the second assumption regarding reliable breed identification. Is there supporting evidence? It turns out that there is quite a bit of science on this topic – and the results are quite illuminating.

Pit Bull or something else? Prior to the development of reliable DNA testing, the only method available for identifying the breed of a dog whose heritage was unknown was visual assessment. A shelter worker, veterinarian or animal control officer would examine the dog and assign a breed designation based upon physical appearance and conformation. Even with widespread availability of reliable DNA tests, most shelters and rescue groups continue to rely upon visual identification to assign breed labels to the dogs in their care. Given the life or death import of these decisions for some dogs, it is odd that the question of the reliability of these evaluations has not been questioned.

Until recently.

Experts don’t agree: In 2013, Victoria Voith and her co-researchers asked over 900 pet professionals to assign a breed (or mix of breeds) to 20 dogs that they viewed on one-minute video clips. Each of the dogs underwent DNA testing prior to the study, which allowed the researchers to test both the accuracy of visual breed-identification and the degree of agreement among the dog experts. Results: Poor agreement was found between visual breed assignments and DNA results in  14 of the 20 dogs (70 %). Moreover, there was low inter-rater reliability, meaning that the dog experts did not show a high level of agreement regarding breed assignments to the 20 dogs. More than half of the evaluators agreed on the predominant breed in only 7 of the 20 dogs (35 %). Although Pit Bull Terriers were not specifically examined in this study, these results provide evidence that physical appearance is not a reliable method for breed identification.

You say Pit Bull, I say Boxer: The following year, researchers in the US and the UK collaborated and examined the consistency with which shelter workers assigned breed labels to the dogs in their care (2). A group of 416 shelter workers in the US and 54 in the UK were asked to assign a breed or mix of breeds to photographs of 20 dogs. They also completed a questionnaire that asked them to list the specific features that they used in their determination. Of the 20 dogs that were used in this study, more than 3/4 had a bully-breed appearance. (Note: An important difference between  the UK and the US is that all UK shelters are subject to the country’s Dangerous Dog Act, a law that bans the ownership of Pit Bulls. While such bans exist in the US, there is no universal law. Rather, select municipalities or states have various forms of BSL). Results: Perhaps not surprisingly, UK shelter workers were much less likely to identify a dog with a “bully appearance” as a Pit Bull Terrier than were US shelter workers. Instead, the UK shelter workers tended to label these dogs as Staffordshire Bull Terriers, a breed that is allowed in the UK, rather than as a Pit Bull, a breed that is universally banned. Despite this difference, results corroborated Voith’s study in that the researchers found a great deal of variation among shelter workers in their assignments of breed and there was a lack of consensus regarding which of the 20 dogs were identifiable as Pit Bull Terriers.

DNA vs. shelter staff: A 2015 study surveyed experienced shelter staff members at several Florida animal shelters (3). At each of four sites, four staff members were asked to assign breed designations to 30 adoptable dogs who were housed at their shelter. Collectively, 120 dogs were evaluated by 16 staff members. DNA testing was conducted on all of the dogs. A primary objective of this study was to examine the reliability of shelter staff’s ability to identify Pit Bull Terriers and dogs with Pit Bull heritage and to compare their assessments with DNA results. (Note: The DNA signatures that are used to identify Pit Bull Terriers are those of the American Staffordshire Terrier and the Staffordshire Bull Terriers, two breeds that are considered to be genetically identical to the Pit Bull Terrier). Results: Approximately one-third of the dogs who were identified as a pit bull-type breed by one or more shelter staff lacked any DNA evidence of bully breeds in his/her heritage. When inter-rater reliability was examined, agreement among shelter staff was moderate, but still included a relatively large number of disagreements. What this means in practical terms is that a substantial number of dogs in this study were labeled as pit bulls or pit bull types and yet had no such genetic background. Even if the shelter staff agreed on a particular dog’s identification, this would be rather a moot point (for the dog) if they both happened to be wrong.

But she doesn’t look like a Chow Chow: How can this be? How is it possible that a dog who appears to have the characteristic “pittie-type” head shape,  muscular body and other distinctive features tests negative for Pit Bull heritage? The conclusion that many people make from these discrepancies is that DNA testing must be unreliable, inaccurate, or just plain wrong. However, the fact is that it is not uncommon for the results of DNA tests of dogs who have mixed heritage to identify a set of primary ancestor breeds that look nothing like the dog in question.  This occurs because purebred crosses, particularly after the first generation, can result in unique combinations of genes that produce a wide range of features. When several different breeds are involved, some of these features may not be apparent in any of the ancestral breeds.

This occurs for two reasons. First, many of the breeds that we know today were originally created by crossing two or more existing breeds and then selecting for a small set of physically unique traits in subsequent generations. However, the dogs of these breeds still carry genes for a much wider variety of traits, even though the genes are not being “expressed” in the dog’s appearance. When these dogs are then bred to dogs of other breeds the hidden traits may become evident in their puppies. A second reason is that less than 1 percent of the canine genome encodes for breed-specific traits such ear shape, coat type and color, and head shape. So, a dog could be a large part (genetically) of a certain breed, while not showing all of the breeds physical traits, which may have been rapidly lost during cross-breeding with other breeds.

What this means for dogs: These three studies provide valuable evidence that the use of visual assessments to assign breed or breed-mixes to dogs is inaccurate and unreliable. Not to put too fine a point on it, but this information is of more than just casual interest for dogs like Colbie because Pit Bull Terriers and other “bully breeds” are most frequently stigmatized by breed stereotypes and impacted by BSL and shelter policies that require automatic euthanasia. It is not an exaggeration to suggest that identifying an individual dog as a Pit Bull may be a matter of life or death for that dog.

It is not an exaggeration because we now have evidence.

Researchers ask, “What’ in a Name”? A recent paper published by researchers in Clive Wynne’s dog lab at the University of Arizona describes an ambitious series of experiments in which they examined the impact of breed labels on the perceptions of potential adopters and on the eventual outcome for the dog (4). The studies were carried out online and at animal shelters in Florida and Arizona. Participants were asked to rate photographs, videotapes, or live dogs in their kennels. In some conditions the dogs were provided with a breed label and in others they were not. Results: Two major findings came out of these studies. The first showed that stereotypes about Pit Bulls are alive and well and the second showed how this stigmatization ultimately affects dogs:

  1. People rated an image of a “pit-bull-type” dog as less approachable, friendly and intelligent and as more aggressive when compared to an image of either a Labrador Retriever and a Border Collie. In another experiment, labeling a dog as a Pit Bull negatively influenced the perceptions that people had about the dog. When visitors rated a dog who was labeled as a Pit Bull, the dogs were found to be less attractive in terms of perceived approachability, friendliness, intelligence, aggressiveness and adoptability compared with when the same dog was not so labeled.
  2. Dogs who had been labeled as Pit Bulls had  length of stays in the Florida shelter prior to adoption that were over three times as long as the stays of dogs who were matched in appearance, but had been labeled as another breed or breed-mix. When breed labels were removed from the profile cards of dogs offered for adoption, adoption rates for Pit Bulls increased significantly, length of stays prior to adoption in the shelter decreased, as did euthanasia rates. Interestingly, not only pit-bull-type dogs benefited from removing breed labels from the kennel cards. Dogs from working breeds who were available for adoption, in particular Boxers, Dobermans and Mastiffs also showed an increase in adoption rate.

Take Away for Dog Folks

There is a lot to ponder here. We have learned that breed identification using a dog’s physical appearance, even when conducted by experienced dog experts, is flawed in two distinctive ways. First, experts cannot agree consistently about how to label an individual dog. One person’s Boxer-mix is another’s Pit Bull and is yet another’s Bulldog/Lab mix. Second, DNA tests do not consistently confirm breed assignments that were based upon physical appearance. Labeling breeds for purposes of shelter retention, adoption and euthanasia is a highly dubious process, and one that is most critical for Pit Bull Terriers and other bully breeds.

We have also learned that potential adopters react to a Pit Bull label in ways that may adversely affect the outcome for the dog.  Labeling a dog as Pit Bull may increase her length of stay in the shelter, reduce her chances of adoption and increase her risk of being killed – simply because she was assigned a (possibly incorrect) label that changed the perceptions of potential adopters. And last, we have evidence that removing breed labels from the cage cards of adoptable pit-bull-type dogs (and many other dogs) increases their chance of adoption, reduces the length of their stay in the shelter, and increases their chance of simply staying alive.

Pretty in Pink for sure. But, I say, it is time that wearing pink becomes a simple fashion statement for Colbie, just as it is for her pal Ally.

Colbie Play Bow

Cited Studies:

  1. Voith VL, Trevejo R, Dowling-Guyer S, Chadik C, Marder A, Johnson V, Irizarry K. Comparison of visual and DNA breed identification of dogs and inter-observer reliability. American Journal of Sociological Research 2013; 3:17-29.
  2. Hoffman CL, Harrison N, Wolff L, Westgarty C. Is that dog a Pit Bull? A cross-country comparison of perceptions of shelter works regarding breed identification. Journal of Applied Animal Welfare Science 2014; 17:322-339.
  3. Olson KR, Levy JK, Borby B, Crandall MM, Broadhurst JE, Jacks S, Barton RC, Zimmerman MS. Inconsistent identification of pit bull-type dogs by shelter staff. The Veterinary Journal 2015; 206:197-202.
  4. Gunter LM, Barber RT, Wynne CDL. What’s in a name? Effect of breed perceptions & labeling on attractiveness, adoptions & length of stay for pit-bull-type dogs. PLoS ONE  2016; 11:e0146857.doi:10.1371/journal.pone.0146857.

NEW BOOK! This essay is excerpted from my newest Science Dog book, “Only Have Eyes for You: Exploring Canine Research with The Science Dog“.

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