I don't post much but do lurk on this forum quite a bit. I had a great Elhew pup with this type of mange. After several hundreds of dollars and un-told frustrations I had to return the pup to the breeder. I have since found/heard of several more Elhew dogs with problems. The pup wasn't put down and a season later he still has it on recurring basis - everytime he's stressed. I would suggest returning the dog to the breeder if it does not clear up right away. I replaced the pup with a started Miller/Elhew 18 month old dog and he's been great thus far. I am no dog expert but believe that some dogs have been line bred in such a manner that genetic problems are cropping up. There may be a case for ruthless culling in some of these lines but few breeders really cull - they just sell off the un-wanted or rejected puppies. Just my two cents worth to share some of your problems since I've been there. Best regards and have a great day.