Tetsamaru said: IIRC, rabbits are part of the animal groups that have to re-eat their own feces.
Para-Medic: That's right. It's called caecal feces. When the rabbit eats fiber, the fier is fermented in the rabbit's appendix, or caecum,and turned into a nutritious substance full of vitamins. The rabbit excretes this substance and then eats it again to absorb the nutrients.