I also have cats. So years ago, after the second doggy door was knocked out of the door between the TV room/library and the laundry room, I had a pass-through put in the wall so the cat pans can be hidden in the laundry room.
Unfortunately some dogs view litter pans as tootsie roll dispensers. Copper is one of those dogs and has recently discovered the pass through. I'm now keeping the pans super clean. And he's providing me with no end of entertainment.