I do not have any rats but am wanting to get some soon in the near future. I already have a large metal cage set up for them, but I did have a question about what to use for the bottom of the cage. The bottom of the cage is a grate so I wanted to put something solid there so the rats don't get bumblefoot or something. The type of cage I have is a Prevue Rat & Chinchilla Critter Cage. It looks like this: My idea was to use carpet samples to lay on top of the grate so that they would have something comfortable to walk on. My plan was to get multiple carpet squares so I can rotate the the dirty carpets for the clean carpets. For cleaning, I would take the carpet out & scrub it & then let it dry for use for the next rotation. However, I've heard that rats can get their toes stuck on some carpets. So is this a good idea? If their toes might get caught on the carpet, another idea I had was to lay down the carpets and then put a layer of fleece on top of the carpet. That way the carpet is still underneath to provide padding, but they will be walking on the fleece instead.