I have had my dog at an allergist for at least a year. No good results. I spent well over $5000 last year treating at the allergist. With no results I decided to go back to his regular vet no results. I have a Bischon Frise who is prone to allergies. He now has what appears to be black heads all over his body. His skin is discolored. What could cause a dog to have black heads?
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