I use fleece liners made of 2 layers of fleece with a layer of towel in the middle on the main floor areas of my cage, as well as a small glass tray full of aspen shavings that I'm trying to encourage Pepper to do his business in. He pretty much leaves his fleece alone - I've never caught him chewing it or pulling it all up or anything, although some chins will. If your chin destroys fleece, KD pine or aspen shavings work. When I got Pepper, my cousin gave me a bag of CareFresh that he'd been using with him. I only put that on the bottom pan and left the rest bare. I noticed he often tried to eat it so once I got my fleece liners sewn, the CareFresh was out. I just used the rest in my guinea pig's cage.