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Black Dog Syndrome

Black dog syndrome or big black dog syndrome is an alleged phenomenon in which black dogs are passed over for adoption in favor of lighter-colored animals. Animal shelters often use the term BBD, or big black dog, to describe the type of larger dark-colored mixed-breed thought by some to be passed over by potential adopters. Black cats are similarly reported to be subject to the same phenomenon. While earlier studies did find some evidence for a lower adoption rate for black dogs, other studies have found that they are actually adopted more quickly than dogs with lighter coat colors. This has led some experts to dismiss black dog syndrome as a 'myth.' However, many rescues and shelters do report a noticeable difference in adoption rates for black dogs.

Initial research at one location identified a longer period experienced by black animals before adoption, but subsequent studies considered to be more robust (as conducted in a larger number of geographically spread shelters) has shown that when shelter visitors video-recorded their walk through the adoption area, they spent equal amounts of time looking at every dog, regardless of coat color. Other studies have suggested brindle dogs may be more likely to experience longer delays before adoption than black dogs. Coat color bias seems evident, but may change depending on geographic location.

Some people believe that during the pet adoption process some potential owners associate the color black with evil or misfortune (similar to the common superstition surrounding black cats), and this bias transfers over to their choice of dog.

Additionally, many shelters feature photo profiles of their dogs on the shelter website. Because black dogs do not photograph well, lighter-colored dogs have an advantage with potential adopters browsing the site. A study done by the Los Angeles Animal Services challenges some of these claims, saying that a full 28% of adopted dogs are black. However, appearance in general does play a role in potential adopters' selection of shelter dogs. In a 2011 study by the ASPCA, appearance was the most frequently cited reason for adopters of both puppies (29 percent) and adult dogs (26 percent). So with all of this information, often with it conflicting, what does the individual research say?



The Image Studies

Various studies conducted using images that were shown to participants are listed below, complete with links.


A 1992 article in the journal Animal Welfare was conducted on adoptable dog characteristics. Participants in South Belfast were presented with photographs of dogs similar except for one manipulated feature, resulting in a statistically reliable preference for a blond coat (65%) over a black coat.


A 2012 report in the journal Society and Animals on a pair of studies recording participant rankings of pictured dogs of varying attributes along eight different personality traits did not find a bias against black dogs. In the first study, using four types of Poodles (large black, small black, large white, and small white), 795 participants ranked black poodles as more friendly than white poodles. A second study with eight different breeds, including a Black Lab, suggested that the personality ratings of participants was based more on stereotypes of breed than on color. It concluded that "in general, with the exception of the Golden Retriever, black labs were perceived as consistently less dominant and less hostile than other large breeds, contrary to the assumption that large, black dogs are viewed negatively.


A 2013 study published in the journal Anthrozoös displayed photographs of dogs colored either yellow or black, and with floppy ears or pointy ears. It found that “participants rated the yellow dog significantly higher than the black dog on the personality dimensions of Agreeableness, Conscientiousness, and Emotional Stability. It also found significant difference in ratings based on ear size, indicating “that people attribute different personality characteristics to dogs based solely on physical characteristics [such as color or coat type] of the dog.”


A study presented at the 2013 International Society for Anthrozoology conference that showed participants pictures of cats and dogs of varying colors found white cats were considered the friendliest, orange cats second friendliest, and black cats least friendly. Among dogs, yellow dogs were considered friendliest, brown dogs second friendliest, and black dogs least friendly. Darker pets were similarly judged less adoptable, and black dogs were considered the most aggressive.


The Shelter Studies

Various studies conducted in shelters and rescues are listed below, complete with links.


A 1992 article in the journal Animal Welfare (viewable via The Wayback Machine here) found that color was not a major factor in adoptions at a Northern Ireland shelter; black-and-white coats were most prevalent among adopted dogs, followed by yellow, solid black, gold, and black-and-tan coats.


In 2008 the general manager of the Los Angeles Animal Services department reported that twelve months of data on the intake of 30,046 dogs showed slightly more dogs that were predominantly or all black were adopted than dogs who were not predominantly or all black.


A 2013 study of dogs' length of stay (LOS) at two New York "no kill" shelters determined that canine coat color had no effect. The study noted that coat color's effect on LOS may be localized, or may not generalize to traditional or other types of shelters.


A Masters thesis analysis of 16,800 dogs at two Pacific Northwest shelters found that black dogs were adopted more quickly than average at both shelters.


A 2013 study of cat adoption rates published in The Open Veterinary Science Journal concluded that "Results indicated that black cats, regardless of age or sex, require the longest time to adopt. They are followed by primarily black cats with other colors."


According to a 2016 study published in Animal Welfare, black dogs were actually more likely to be adopted than dogs with lighter coat colours. This casts doubt on the existence of black dog syndrome, and author Christy Hoffman suggests that other breeds (such as pit bulls and other bully dogs) are more likely to be overlooked than black dogs.



The Reality

It would appear, after pouring over the research for several days, that black dogs do not suffer a statistically noticeable hardship over dogs of other colors when it comes to their rates of adoption or the time in which it may take for them to be adopted, regardless of what the anecdotes from some shelters claim. Though there is data to suggest that some people do have various biases based on nonsensical reasoning and arbitrary physical characteristics. When it comes to dogs, the discriminations mostly lies with the breed. Bully breeds are much more likely to be looked over when in shelters. That is a fact.

Cats, however, do seem to experience this colorist phenomenon, and they do seem to be disproportionately skipped over for adoption and take longer to adopt. From what I can tell, this appears to mostly stem from antiquated superstition.

So if you would like to do something to combat adoption discrimination for dogs, and you're looking for a new canine companion, please consider a bully breed! There are lots of them in our local shelters, and they are often incredible dogs. And if you're wanting a cat, consider adopting a black one! We promise they aren't evil. They need homes too! And what better time than spooky season to break the mold and ignore antiquated stereotypes by bringing a new bundle of love into your home? 🎃



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