I've been reading posts about using fleece as bedding, which I use with my Guinea pigs along with U-Haul pads, which works very well, although obviously Guinea pigs aren't the chewers rats are. I was considering trying this with my rats as one of them is a big-time food hoarder and I either end up throwing out a lot of food when I clean his cage, or I have to take the time to pick individual pieces out of the CareFresh bedding. I have washable pee pads for my dogs to use when it's too cold outside in the winter (naked dogs/cold climate) and wondered whether sewing a washable pad onto a coroplast sheet might work since the top layer is a wicking fabric. I'm not sure what's inside, but if it was dangerous to rats, I could use only the top layer of the washable pee pad and then put U-Haul pads underneath for the absorbent layer. These washable pads aren't cheap (about $55 Cdn for two 30" x 36" pads), so if the rats chewed and destroyed them, it wouldn't be financially feasible to keep replacing, but just wondering if anyone has tried this or has any thoughts on whether it's a good idea or not.