Study Finds Dog Breed Not a Reliable Indicator of Behavior

The study analyzed the genetics of 2,155 dogs and surveyed 18,385 owners, finding that behavior could only be predicted for 9% of dog breeds. Marjie Alonso, a co-author of the study, stated, "What the dog looks like is not really going to tell you what a dog acts like.”

Historically, dogs evolved from wolves that scavenged near early human settlements. Kathryn Lord, another researcher involved in the study, noted that rather than humans adopting dogs, wolves adapted to human environments, making them useful for tasks such as herding and guarding.

Lord explained that the early relationship involved natural selection, where dogs that were more helpful were given more food, increasing their chances of survival and reproduction.

Modern breeding practices often prioritize physical traits over behavior. While some characteristics, such as a dog's responsiveness to commands, can correlate with breed, aggression is more closely tied to a dog's upbringing. Elinor Karlsson, a co-lead author on the study, stated that behavior varies widely within breeds, suggesting that Chihuahuas could behave like Great Danes and vice versa.

The study raises concerns about breed-specific legislation that bans ownership of certain breeds. Many jurisdictions enforce laws against some breeds based on their perceived danger. Karlsson argues that such legislation is not justified, noting that the genetic diversity of a breed is crucial for its health. Inbreeding, as a result of selective breeding, can lead to endemic genetic diseases within dog populations.

The findings suggest that the focus on breed rather than individual compatibility may be misguided and can have serious health implications for dogs.