What do I do when my dog's allergy medication doesn't work?

[Xanney]

Grain-free diet. No wheat, rice, brewer yeast. Been there but it wasn't that severe, I feel so bad for her that it's gone on this long. Demodectic mites feed on the dog's blood sugar. Grains/carbohydrates raise the dog's blood sugar, were never part of her ancestors' diet. Eliminate the mites feeding ground. After two vets couldn't help my dog I spent months searching the internet and found this answer. I switched her to grain-free dog food, threw away chew bones, treats and vitamins that contained brewer yeast that were recommended by the vet. At four weeks most of her hair was growing back. At eight weeks all her hair was grown back.