I originally noticed the rash on the backs of Lamar's legs, at which point I shaved them and applied tea tree oi. When I checked those areas recently, they looked much better--skin still a bit red, but no scabs. But his tail was a mess. Scabs, red skin, and lost fur.
Though I don't relish the idea of my dog looking like a mangy squirrel, it does seem to help to air out the affected area and not have it covered over with thick undercoat. So I shaved down the icky part of his tail and this time I applied a liberal splash of chlorhexidine flush.
If you're around lots of different animals--if you train, foster, groom, volunteer at a shelter--or just have your own pets and lots of friends who have them, its great to have a medicine chest with some basic veterinary remedies. This flush is one I'm going to keep around.