Ok well my min pin Red is going to the vet next week. I half to take him because he is scratching his belly, around his eyes, chin, and feet. We all ready took him a few times before getting him med for it. It helped on one thing but we think he has something else. On his belly he is scratching the most at well it was a little bleeding because of his scratching it well his skin is scaley and it's turning darker in spots. I was told some where that mites chang the color... Is this ture?