Why Do Dogs Sniff Butts? - The Trupanion Blog
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Why Do Dogs Sniff Butts?

If you own a dog, then you see it all the time. Dogs sniff other dogs’ butts. Some pet owners don’t mind it while others try to prevent their dogs from doing it.

So what’s the deal, why do dogs sniff butts?

Dogs gather a great deal of information about their surroundings through their nose. Dogs’ noses have anywhere from 125 million to 300 million scent receptors (compare that to a human’s 5 million) and the percentage of their brain devoted to analyzing smells is 40 times larger than that of a human.

Dogs sniff others’ behinds to learn about the other dog. From a little sniff, they can learn what types of food the other dog has eaten recently, its general health, emotional state, the aggression level of another dog, and whether a female is pregnant.

While it may seem gross to us, this is simply how dogs get to know each other and gain information about another dog.

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