Since rabbits are naturally clean and will choose one or more toilet areas, they are generally fairly easy to litter train. Older rabbits are usually easier to train than younger rabbits, especially babies. As a rabbit ages, his attention span and ability to learn increases. If your pet rabbit is a baby, you will need to be patient and allow him to mature. If you are considering adopting an older rabbit or you wish to litter train an older pet rabbit you already own, you can be confident of successful results.