I have one. I have Shih Tzu dog. These are Tibetan dogs that were bred to look and act like lions to guard the temples. They are not lions, but that's another story.
Anyway,when she was a puppy, she used to eat her poop. When she would start doing it, I would try to stop her. She would run around real fast and elude me, dash back, eat some more poop and run away again. This turned into a game for her, not for me. Well, one night it was real cold, and some of her poops were frozen on the ground. In the morning, she grabbed one in her mouth and started running down the street. My neighbor called to me: "So now your dog has that filthy cigar habit too."