Selective breeding for extreme physical traits has created widespread health problems in certain dog breeds.
Dog breed health reform addresses a welfare crisis created by human aesthetic preferences applied to selective breeding. Dogs bred for extreme brachycephalic features often breathe with audible difficulty throughout their lives — a chronic welfare cost that owners frequently normalize or fail to recognize as suffering. Intervertebral disc disease in chondrodystrophic breeds causes sudden acute pain and paralysis. These problems are not individual bad luck but predictable consequences of the breed standard itself. Veterinary organizations and welfare bodies in multiple countries have called for breed standard reform and restrictions on breeding dogs with traits predictably causing suffering.