Well, most do. The reason is the shape of their heads and muzzles. These dogs were bred with brachycephalic, that is, their noses were shortened considerably due to selective breeding. Consequently, many of these dogs have constricted airways and are prone to breathing problems, overheating, and yes, snoring.
Source(s):
I am Margaret H. Bonham, pet expert and author of 30 books.


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