Hi, I am a new rattie mom. I was wondering if anyone puts anything on the wire floor of their cages. I have a cage from Martin's, and I have been cutting cardboard to fit the size of the floor. I was thinking that if I was a rat, it would feel nicer to walk across a solid floor than the wire floor. But the girls make so much noise at night ripping up the cardboard. Any suggestions on what else to use? Thanks for helping!!