Mine uses his bathroom area, its not actually a litter box but folded papertowels in a corner. He always goes on them though and I hardly ever have to pick one off the liner. Makes cleaning easy cause I pull the papertowels out and all the mess is gone, he doesn't mess his wheel and will actually stop and go to the bathroom on the papertowel. I lucked out big time even though I was prepared if he didn't. He's very very clean and the only thing that would let someone know he was up is a few crumbs by his bowl and his top papertowel messed up lol