I have heard that you should actually have one more litter box than you do cats. That would mean that I should have four boxes for my 3 kitties, but my small house just does not have the space for that many - I only have two boxes. However, one is a large plastic storage box that is double the size of a traditional kitty litter box. I keep it in the shower of the cat's bathroom because my boy, Bo, tends to stand and pee sometimes. So even though the box is nine inches high, he'll shoot over the top of the box.

He will ocassionally use Trixie's box too (which is in a carpeted room) so I have to put down a plastic disposable tablecloth so try to prevent urine stains. Sigh...even though I don't have a male in my home that leaves the toilet seat up, I still have to deal with male bathroom problems.