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Why do dogs smell butts?

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An average dog's nose is anywhere between 10,000 to 100,000 times more sensitive than ours, and smelling each others' butts is just another example of chemical communication in the animal kingdom. It's like "speaking with chemicals," and that's how dogs ask about another dog's diet, gender, and emotional state. read more

A dog’s sense of smell is 10,000 to 100,000 times better than ours thanks to its large olfactory membrane, a lump of tissue tucked up in its snout that can be as large as a handkerchief and hold more than 225 million olfactory receptors. read more

In fact, dogs commonly smell the rear of another dog upon meeting as a sort of handshake. Butt sniffing is a very natural, instinctive, and basic form of dog-to-dog communication that helps share information, kind of like a status update. read more

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