@BorisKitten,
To reply to myself: Boris is allergic, according the my local vet, to "Something in the air." In Florida, this could be, well, practically anything, and possibly Everything.
Boris has looked like crap for several years now, constantly scratching/biting his beautiful fur. I somehow stumbled across a website that suggested that "cat allergies" might be helped by a simple mixture of Apple Cider Vinegar and water, mixed about 1/2 and 1/2. I've used this on Boris Kitten for the past week, and honestly it seems to help him just as much as his (very expensive) shots of Depo-Medro (as I recall) from the vet, which we can no longer afford.
I apply this 1/2 & 1/2 Apple Cider Vinegar and Water mixture to a paper towel, and apply it to Boris Kitten, mostly to his paws and upper back. He does NOT like it, but it's much better than a vet visit! His pathetic little fur seems to be growing back!
If this helps BK, it will be the first thing that really DOES help him in a few years! And gosh knows I've spent a small fortune on trying to help him.
BTW, BK is on a no-grain cat food (Innova's Evo, which is not cheap) which I get from the Internet, plus montly Advantage for fleas, plus his monthly whatever-they're-called shots from the vet, all of which have had crappy results.