Sleeping in the litter box?!?

My cat Pepper Sleeps in the litter box, usually right after we change it. Is this because he wants to mark his territory before any of the other Cats do? We have 3 litter boxes, and he has to go in everyone of them before he'll let any of the other 4 go. Do you know why he does this? He has been doing it since as long as I can remember! Thanks!

Actually, cats sleeping in litter boxes is usually a sign that they are very unhappy about something. They tend to seek out the cubbies when they are depressed, stressed or not feeling well. He may just be going in there when it's cleaned, because it's clean and he can. I would keep an eye on him and try to get to the bottom of his discontent.

Does he have a nice kitty bed? Maybe you could get him a little snuggly bed to replace what he seems to think is a nice comfy bed aka the litterbox.