My little dog developed yeast infections in her ears and she was also licking her paws and had them discolored. Her thyroid was fine and our vet tried everything for her. Then he sent us to a specialist that did different blood tests and she's highly allergic to dust mites and storage mites. We'd never heard of storage mites and were told that they're in bags and boxes of dry food/snacks, etc. Even though we were feeding her good stuff we were giving her the storage mites with it. Now she's on a prescription rabbit and potato canned food diet and for a treat she gets some baked sweet potato or cut up raw carrots. She loves getting "treats" but it's actually part of her diet too. We also have to give her a shot every week. Thankfully she can go outside because she was fine with grass and pollen.