Selective breeding for extreme physical traits has created heritable health problems in many dog breeds that cause chronic suffering — a welfare problem with both individual and systemic dimensions.
Breed-related genetic health problems represent welfare suffering built into the animal at the time of birth through deliberate selection for traits that compromise health. Brachycephalic dogs that struggle to breathe at rest are not experiencing an accident — they are experiencing the predictable consequence of breeding selection that prioritized skull shape over respiratory function. The scale of this welfare problem — tens of millions of affected dogs globally — makes it one of the largest preventable causes of chronic companion animal suffering. Progress requires consumer demand shifting away from extreme breed traits, veterinary willingness to advise honestly, and breed standard reform that deprioritizes health-impairing physical features.