I had the care fresh stuff in it and he slept in it. I bought him a bigger rectangle box and put the litter you see in the photo, he moved to sleeping in that one Lol. So I made the large one his permanent bed. I cleaned out the cage and put hay to nibble on in the litter box. He went inside his little tunnel and peed there instead. He's just barely 2months so maybe I'm expecting too much. He has improved though. Before he was peeing and pooping all over the cage, we narrowed it down to one side of the cage. Hopefully next it will be one corner