Sometimes, dogs do strange things. Beyond rolling in mud puddles or biting themselves, your pet might drink from toilets or lick its butt. In other cases, it may eat its own poop or, worse, the poop ...

"Ghost poop" is a bowel movement that seemingly disappears without a trace after you flush the toilet. There’s no sign of it either in the toilet paper that you used to wipe your butt or in the toilet ...

Sometimes, people have poop that's so dark it looks black. It might also have a sticky consistency, like that of tar. If your poop is black, it might be due to a change in your diet, a new medicine ...