Many a time a cute guinea has grossed out its owner by picking up its own poop and ate it right there. Don't worry this is a normal healthy habit amongst guinea pigs and should not be discouraged. This habit is called cophrology. Guinea pigs release two different types of dung. One type is the one we all know which is just solid waste. The other type which guinea pigs excrete is called caecotrophs. These caecotrophs contain water, vitamins and protein. Guinea pigs excrete caecotrophs because they cannot chew thier food fully and thereby required to digest thier food a second time. Isn't that food for thought.