When house training your rabbit goes bad, you probably move your rabbit out of the house, right? Here's a way to successfully house train your bunny. First only let your rabbit romp in one small room. Place a litter box in that room with some of the rabbit's poop in it. Block off electrical wires and small areas that your rabbit can squeeze through. Pick up books and toys and leave a completely clear path for your rabbit.
The best rabbit litter we've found in 20 years of keeping house rabbits is wood pellets. Some suppliers have a product called Woody Pet, but the wood pellets used to fuel wood pellet stoves are usually cheaper.
Believe it or not, rabbits can be trained to use a litterbox, just like a cat! Training will be easier than you might think -- rabbits by nature will pick one place for their bathroom and stick to it.