I'd go see the vet about a skin scraping too.
When our rescue, Stottie came to us he had horrid scabby ears that smelled funky and had clumps of black/grey scabs and hair falling off leaving him with sore, pink, bald patches. I got the vet to check them out as we thought it could be either Demodex (skin mites) or Ear Margin Vasculitis which can be pretty nasty for the poor dog.
Fortunately Stottie's problem turned out to be Ear Margin Dermatosis which cleared up quickly with a daily wash with vet formula tea tree shampoo.
I now only shampoo his ears with the prescription stuff once a month when he has his usual bath and when it runs out, I'll just buy some pet store tea tree shampoo just to make sure it never comes back.
We never did find the cause of it but i strongly suspect the problem was the poor diet Stottie was on previously. He now eats raw three/four times a week and Orijen kibble the rest of the time.
Last edited by Ember; 01-10-2011 at 07:52 AM.