Cognitive scientist Alexandra Horowitz, author of the excellent book on dog psychology Inside of a Dog, explains how breeding dogs for specific characteristics inflicts pain and suffering on the results due to generations of inbreeding:
Breeders are not typically mating siblings, though it is not prohibited by the American Kennel Club and is not unheard of. Any mating within a closed gene pool of candidates will do, as far as breeders are concerned. But according to research published by a team from the University of California, Davis, and Wisdom Health Genetics in Finland, purebred dogs have, on average, a “coefficient of inbreeding” of 0.25, the same number you get when two siblings have a child. This number indicates the probability that two individuals will share two alleles from a common ancestor, like a parent or grandparent. And this number — 0.25 — is a problem.
The results of pure-breeding, on display starting this Saturday at the Westminster Kennel Club Dog Show in New York, are profound. The radical morphological diversity of dog breeds today — from four-pound Malteses, white-haired and small-faced, to 170-pound Great Danes, large of body and of presence — is due to selective breeding.
So, too, are the consequences: the occurrence of several hundred health disorders related to genetics or to adherence to the standards set by breed groups that have emerged since dog pure-breeding took off in the 19th century. These include changes to anatomy so drastic that they affect reproduction (the bulldog’s head is so big that the overwhelming majority cannot be birthed naturally), respiration (the pug’s small skull leads to a constellation of abnormalities that make breathing difficult) and recreation (the German shepherd and other large-breed dogs are prone to debilitating hip dysplasia).
Right now, the American Kennel Club has no constraints on inbreeding (even as it encourages breeders to remember that “crippling or fatal” hereditary diseases may result). But I am not counting on the American Kennel Club. Instead, we could make outcrosses — the introduction of different genetic material to breeds — the norm.
Or we could, you know, just stop breeding dogs, and let them make their own offspring however they will. With millions of healthy but unwanted puppies in the world, and millions of purebred dogs suffering with genetic diseases brought on by generations of inbreeding, just adopt a mutt. Everyone wins.
