[header] How to compare cat litter boxes [title] Figure out if your cat has a specific preference. [step] Cats with short legs or older cats with arthritis will probably require a litter box that is lower. That way, they can get in more easily. 
[substeps] If your cat suffers from urinary disease, is older or just shorter, it will likely need a litter box where it can enter and leave more easily. Climbing of any kind can become painful, forcing the cat to go outside the box.