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Facts about Dogs 7
Chihuahuas are clannish, preferring their own kind. As a rule, they do not like dogs of other breeds.
Short snouted dogs were popular as pets in the 19th century, and breeders accentuated this trait. The result was several breeds of dogs, such as pugs and Pekinese, with extremely short snouts - so short, in fact, that their abbreviated windpipes can lead to breathing difficulties.
More facts about dogs
Short-snouted dogs were popular among the childless European aristocracy because they were thought to resemble human babies.
