If you are going to put something like this in the cage I would not put it somewhere and force them to walk on it, like where their food and water dishes are. I have not heard of anyone using this method for nails. Usually we buy a wheel that has trim trax in it for when they run it keeps them short. I understand that they are wild animals and are meant to climb trees and rocks, I would just worry about the pads of their feet getting injured.