i use this bedding that is like paper called care fresh. however on the packaging it says it is hypoallergenic,so i didn't think that it could create a rash or anything of that sort. i pretty much feed him the same thing that his previous owner has instructed me to feed him, but i can slowly rule things out one by one to see if it may be a cause. I just use water and flax seed oil to bathe him, and i only do this once every week and a half or so.