Litter training a rabbit is possible and can make clean-up easier. Start by placing a litter box in a corner of the enclosure where the rabbit tends to eliminate. Fill the litter box with rabbit-safe litter, such as paper-based or aspen shavings. Whenever your rabbit uses the litter box, praise and reward them with treats or gentle petting. If your rabbit eliminates outside the litter box, clean up the mess and place the droppings in the litter box to help them understand where they should go. Consistency, patience, and positive reinforcement are key when litter training a rabbit.