Where do you live?
My hav broke out in a horrid rash when she was 9 months old ... she had what the vet called "Pustules", he did skin scrapings and blood allergy testing. Turns out she (like your hav) is allergic to nearly everything one would find in dog food. the short list?
Turkey, chicken, carrots, apples, oatmeal, wheat, green beans, peas, fish, pork, potatoes, soy, rabbit, corn, berries ... shall I go on? lol
After getting the results, I contacted a lady named "Sabine" who runs an ONLINE business. She is a dog nutritionists and makes INDIVIDUALLY balanced diets for dogs.
Tillie has been on this diet for almost 2 yrs. It was overwhelming at first as I chose to go the homecooked route and there is a lot to learn and a lot to figure out how to get set up but it is well worth it. SO much healthier in the long run AND way better for our dogs AND saves on vet bills!!
just a thought you might look into ... her web site is
good luck and WELCOME to the forum!!