Bunny Care Guide - How To Litter Train Your Bunny
First of all, put the idea of 'training' out of your mind. You're not really training your rabbit at all. A rabbit will naturally pick a place that it likes to toilet in, and it will return to that place like clockwork unless it becomes sick or disturbed in some other fashion. What you are really doing is finding out where your rabbit wants to go, and putting a litter tray there.
Secondly, realize that the training mostly refers to the urine and soft droppings. Your bunny will most likely leave a few hard round pellets about the place from time to time. This is how rabbits mark their territory. These pellets are easily swept up and are odorless, so they are not a major concern to most people.
Ideally, your rabbit will simply return to its cage in order to relieve itself, and this is what many rabbits do, especially if enough 'in cage' time is given at the early stages, so that the rabbit can develop a strong connection to its potty place.
Always enable your rabbit access to its cage, there is no better way to ensure an accident than by mistakenly shutting the cage door and forcing the bunny to find a new place, a new place which will in all likelihood, stick.
methods recommend placing litter trays in every corner of the area your rabbit is going to be allowed in when you first let your rabbit out of the cage, and then removing litter trays when your rabbit shows you which of these it chooses to use. This is a valid method, though it may be a bit overkill, and if you are on a limited budget, the prospect of buying multiple uneccesary litter trays may not be one you relish. You may also not like the idea of having your home turned into an open litter tray and having to leave trays out in various corners of your home.
An alternative is to limit the space the bunny has when it exits its cage. Let the bunny leave and return at will, building its confidence in being able to come and go, and reinforcing the toileting behavior as you slowly expand the rabbit's realm.
Fortunately for us humans, rabbit training generally is very easy. You may have accidents and your bunny may have its own preferences (which are generally best worked with, not against as the likelihood that the bunny is going to change its mind about where it wants to toilet are very slim.) At the end of the day however, toilet 'training' your bunny is one of the simplest and easiest things you can do to ensure you enjoy your rabbit's company over the years