Why do bunny eat there poop?

Answer 1

Rabbits make two different kinds of droppings: feces, and cecotropes. Feces are the normal small hard balls left behind by rabbits in their litter boxes and around their habitat. Cecotropes are not often seen, because they are eaten by the rabbit from the anus, in a form of reingestion called "cecotrophy."

A rabbit that is seen to chew and spit out his or her feces may have accidentally taken the feces in his mouth while ingesting cecotropes, or he may have found the feces in his territory and given it a little nibble to determine who put it there. These behaviours are unusual but not necessarily anything to worry about; however, as always when you notice your rabbit performing a new or odd behaviour, keep close eye on him and bring him to the vet's at first sign of illness. If your rabbit is healthy and normal in all other ways, just make a note of the odd event and bring it up at your next regular vet appointment.

See the related questions below for more details.

Answer 2

Bunnies eat their own feces (poop) because they still get nutrients out of it. Most of what rabbits eat is grass and plant life. After they defecate their feces still has grass particles and nutrients. Bottom line, their poop still has food to eat for them. This is same with deer.