Have you checked him to see if maybe he has fleas and that is where the fleas were bitting him. I know when I found my puppy he had them all over and when we treated the fleas they went away. Just an idea, I would find out about the ear mites as well though!
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Meat Loaf (Brittany Spaniel) 13 months
CryBaby (5 years old)living with grandpa now
Chino (Doberman mix) 7 months old
2 new kittens (8 weeks old) Felix and Gizmo