I have been covering the bottom of my cage with fresh news small animal litter and leaving the door open for them to use as a litter box (I let them roam around my room) lately they've been great and will run in to use it, and when I see them doing this I'll use my clicker, praise them, and give them some furovite. It's been working but there's still a few mishaps here and there. I was wondering what your guy's litter box setups are like!