French bulldogs, pugs, and bulldogs have become among the most popular breeds globally despite chronic respiratory, eye, and skin problems arising directly from selective breeding for flat-faced appearance.
Brachycephalic dogs live with chronic respiratory compromise that owners often normalize as typical breed behavior. The snoring, snorting, and exercise intolerance characteristic of these breeds reflect airways so obstructed that normal breathing is effortful. A dog that cannot exercise, play, or sleep without breathing difficulties is experiencing chronic welfare compromise.