0% But it is made out of chinchilla safe wood. And I can just make more latter. Takes me like 10 Minutes to make one and It is kinda relaxing.
Luna already started to chew hers.
Annie dont chew on anything but what is meant to be chewed on it is nice! With her I can put plastic crates for her to play on and in with out saying "no stop chewing on that!" Haha