He doesn't have any (known) alergies, but does have a sensitive skin, I think. :) He tends to scratch a lot. I even changed his diet to no grains and no other junk in it, but I don't see any change.
Yes, I could try topical MMS , I considered that too, but my idea is to try and see firsts if ingesting it improoves anything. And, it's easier to sneak it into his food than to chase him around and try to keep him still while putting it onto his skin! :)