Just got back from the vet. She says it's more than likely not scale rot and looks like some minor burn blistering. (Maybe from the housing that it was in at the store?) No R.I. either. A few warm soaks and a daily application of Chlorhexadine and he(?) will be good to go after a few sheds. I'm glad. Now it's off to the store again to return my new leaky water bottles for the rats...