Woof woof woof! It’s Woof Week here on Moment of Um, where we’re learning  about all things related to dogs! In today’s episode, Dr. Carlo Siracusa answers the question “Why do dogs sniff each other’s butts?”

Got a question that’s hounding you?  Send it to us at BrainsOn.org/contact, and we’ll help you answer it–it’s the leash we can do.