Large dog with blue background. Side profile of senior dog looking guilty sad or ashamed. Side profile of 10 years old female American Pitbull terrier, silver fawn color. Selective focus. Copy space.© ...

When I was living in Chicago, my landlady had a wonderful golden retriever that was incredibly friendly, smart and fun to play with - but he had one ridiculous habit: he liked to eat his own poop.

Add Yahoo as a preferred source to see more of our stories on Google. Large dog with blue background. Side profile of senior dog looking guilty sad or ashamed. Side profile of 10 years old female ...

“Poop is central to the story of how dogs came into our lives," write Duke University dog researchers Brian Hare and Vanessa Woods in their wonderful new book, Survival of the Friendliest: ...