The Black Dog Syndrome

There is the notion that dark pets are discriminated against. Shelter workers repeatedly observe the phenomenon that black dogs have to wait longer to get adopted than lighter-furred ones and that they get euthanised more often. Speculations on the reasons why black dogs are discriiminated agaist vary and range from superstition, i.e., mythologies around black dogs being evil and scary to black dogs' faces regarded as less expressive or facial expressions more difficult to read. Photographs play a major role in the adoption process. When black dogs are photographed in a way that makes only a black silhouette and a big tongue visible, and the eyes and eyebrows get lost, there is little response since people might find it harder to huanise them and build a connection (via).

Other hypotheses floating around the trade: Would-be owners worry that a black dog will shed too noticeably on the furniture; black dogs get overheated more easily at adoption events and don’t introduce themselves; black dogs look older; black dogs strike people as boring. And one chow jowl-wrinkle that no one mentions: Studies suggest that people tend to choose pooches that bear some resemblance to them, whether that manifests in a lady with flowing tresses selecting a long-eared retriever or a saggy-faced man opting for a bulldog. Could the link between an owner’s and a dog’s appearance factor into the phenomenon? According to a Pew survey, 45 percent of white people own a dog, compared to 20 percent of black people. (Looking at presidential pets, Bo Obama is black, but then so was George W. Bush’s Miss Beazley.) (via)

In other words, there are a great many anecdotes but it is not yet clear if the Black Dog Syndrome is nothing more than an urban legend. Various studies do not support the syndrome (via). Some studies find some evidence, others find none (via and via). The relationship, if there is any, is not straightforward as the following abstract illustrates:

Most support for Black Dog Syndrome or Big Black Dog Syndrome is anecdotal or theoretical. Yet some animal shelters/organizations have implemented strategies to address what they believe are lower rates of adoption and/or higher rates of euthanasia for “Big Black Dogs.” This study examines the persistent anecdotes and theories on humans’ preferences and aversions to dogs of various shades, using hierarchical multinomial logistic regression to predict outcomes for an analytic sample of 7,440 dogs from 2010–2011 in an urban, public animal shelter serving Louisville, Kentucky, USA. The relationship between coat shade and dog outcomes was not straightforward; while no relationship existed at the bivariate level, after controls were added, entirely black dogs showed somewhat lower odds of adoption—and higher euthanasia risk—than those characterized as secondarily black or sans black. Breed category, breed size, and purebred status were stronger predictors of dog outcomes than coat shade. Big Black Dog Syndrome was not supported by these data; smaller dogs were more likely to be euthanized if they were partly or wholly black. These findings may offer nuances to adoption strategies employed by shelters/organizations, help make better use of resources, and, perhaps, improve the likelihood of homing or rehoming shelter animals. (Sinski et al., 2016)

And, finally some anecdotes: 

We recently had a litter of five very cute, very fluffy puppies, two yellow and three black. And the yellow ones all went immediately, but for the black ones it took weeks.
Mirah Horowitz

Marika Bell, director of behavior and rehoming for the Humane Society of Washington, D.C., says the organization has been tracking animals that have stayed at their shelters the longest since March 2013. They found that three characteristics put a pet at risk of becoming one of these so-called “hidden gems”: medium size, an age of 2-3 years, and an ebony coat. (via)

Employees at our shelter constantly witness visitors scanning the kennels as they walk down the aisles in search of a new friend and merely glance at the black dogs but stop completely when they approach a "colored" dog.” Pam Backer, cited in Castek (2010)

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- Castek, J. (2010). Black Dog Syndrome, link
-  Sinski, J. Carini, R. M. & Weber, J. D. (2016). Putting (Big) Black Dog Syndrome to the Test: Evidence from a Large Metropolitan Shelter. Anthrozoös, 26(4), link
- photograph by Eliot Erwitt (1953) via