Missy's been barbering herself for a while. I've seen her do it, and I treated for mites when it started and recently just in case. I can't tell if her skin looks normal though. I don't think it was always this red?
I don't think it's suppose to be that red...
Maybe it's just irritated from him scratching at it? And it's on his belly, I bet marinating in ratty pee isn't helping it much. Can rats get diaper rash? lol
My vet recommended Aveeno with oatmeal for skin irritations. And to stop the barbering I used Sally Hansen Nail Biter and it worked but make sure the skin is not broken when you apply it as it stings a little.(I tried it on myself first)