Obviously, without fur, scratches will show more on a hairless rat. Is there anything I can do (short of trimming/filing nails, as we're still working on trust training) to help combat this a little? I guess it's not bothering them too much, but when I see a new bright red scratch I feel awful, like I should be doing something to prevent it. I think it's just from Prismo and Billy wrestling around, as there isn't anything in the cage that can cause a scratch like that. I just feel bad is there anything that can help?