
A rabbit’s diet should consist mostly of hay (alfalfa, timothy or oat), pellets, vegetables and water. However there are some plants that are toxic to rabbits.
For a complete list of toxic foods, see the list on rabbit.org

Much like a kitty, your bunny rabbit can do her business in a litter-box. It is vital to use the correct lining and dispose of the waste regularly. An unhealthy litter-box can lead to health problems such as kidney disease.
Documented scientific research has already shown that aromatic softwood beddings are potent enough to alter biological functions of the liver.
– Vesell, E.S. (1967) Induction of Drug-Metabolizing Enzymes in Liver Microsomes of Mice and Rats by softwood bedding. Science. 157, 1058
Good lining choices are:
Unhealthy lining choices:
Source: rabbit.org