There are several options you can use for a rabbit's litter box. Here are some commonly used materials: 1. Paper-Based Pellets: Paper-based pellets made from recycled paper are a popular choice for rabbit litter boxes. They are highly absorbent, control odor well, and are generally safe if ingested by the rabbit. 2. Wood Shavings: Kiln-dried, hardwood shavings can also be used as litter for rabbits. Avoid using softwoods like cedar or pine, as they contain aromatic oils that can be harmful to rabbits. Aspen or other hardwood shavings are safer options. 3. Straw or Hay: Some rabbit owners use straw or hay as a litter material. While it may not be as absorbent as other options, it can provide a more natural and comfortable bedding surface for the rabbit. 4. Recycled Paper Bedding: Recycled paper bedding, similar to the kind used for small animals like hamsters, can be suitable for rabbit litter boxes. Ensure it is free from harmful additives or chemicals. When choosing a litter material, consider your rabbit's preferences and any potential allergies or sensitivities they may have. It's important to avoid dusty or fragrant materials that could irritate their respiratory system. Also, provide a separate area for the rabbit to eat hay, as they may tend to eat litter if it contains hay or food remnants. Remember to clean the litter box regularly to maintain hygiene and prevent odors. Replace the litter entirely at least once a week and spot clean as needed to keep the litter box clean and fresh for your rabbit.