Yes, rabbits can be trained to use a litter box. It is similar to how cats are litter trained. Rabbits are naturally clean animals, and with patience and consistency, they can learn to use a litter box for their bathroom needs. It's important to use a litter box that is the right size for the rabbit and to place it in a location where the rabbit feels comfortable using it. Rewarding the rabbit with treats or positive reinforcement when they use the litter box can also help with the training process.