Flat-faced dog breeds like bulldogs, pugs, and French bulldogs suffer from breathing difficulties caused by selective breeding for extreme anatomy. Understanding BOAS is essential for prospective owners.
Brachycephalic dog welfare represents a human-caused welfare crisis: the extreme skull shapes that make these breeds appealing to owners are the direct cause of their suffering. Breathing restriction in severe BOAS affects the dog constantly — every breath, every bout of exercise, and every warm night involves effort that healthy dogs do not experience. Sleep apnoea in over half of studied dogs means that even rest is compromised. The dogs themselves cannot communicate this chronic difficulty — they do not pant because they are "overheated," but because they are struggling to breathe at rest. Consumer demand drives breeding of ever-more-extreme phenotypes. The welfare solution requires demand reduction for extreme-brachycephalic breeds, breeding regulations that mandate health screening and discourage the most extreme anatomy, and honest communication by veterinarians about the welfare implications of breed choice.