Most chinchillas just tear off pieces of the cardboard. My guys like the toss tubes I make. They nibble the ends off for fun. I'm constantly cleaning up paper shreds! In my opinion, you can give the tubes to them, you just have to watch to make sure that they're not eating it. My guys love running through the big tubes and occasionally tearing at them during play time. It's easy to watch when play time is supervised! (which it should always be)