I appreciate the good information. Of all the dogs I have had, I have never seen mange - of any kind. Unfortunately he has it all over. I think the heat has been a factor in it. It has been over 90 for 24 days so far. The vet said the same thing about the litter mates. He said he bet they all looked the same way. I e-mailed her to tell her about the diagnosis, but I have not received a reply.