I use a covered litter box for both of my cats. I think the brand is Van Ness and if I remember they cost less than $20. They are very easy to clean, you just have to unlatch it. I find that they are helpful with my larger cat because he has a little too much of his body sticking out of the regular litter boxes that would cause an occasional spill. It also helps keep the litter in the box and not on my floor. I also think that enjoy their privacy having a covered litter box.