00:00When a bulldog breathes, its squashed snout and closed nostrils block the air from flowing properly.
00:07But hundreds of years ago, they had longer snouts, smoother faces, and straighter legs.
00:13Over the years, close relatives were bred together to exaggerate their features.
00:19And now their big jaws cause crowded teeth and infected gums.
00:23Their skin folds get constant infections, and their snouts cause serious breathing problems.
00:29And since they've been bred to have large heads, giving birth to the puppies is almost impossible.
00:35Instead, they have to be cut out.
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