My post #25 was intended for you too.
Thanks. You can give the colostrum a try.
Have you ever tried elimination diets?
My dog was allergic to animal stuff. Yes. Nightmare. She was nothing but vegetarian, ALL her life (Tara was itchy from the get-go and could not even grow in her adult hair, she scratched so much). That means no treats basically, no pet-store visits, no bones. Sad. She had vegetarian food. Best was from the derm, but some at the shops could be used.
Also allergic to about every single thing in the environment there could be. 64 tests and she would fail 40, mostly indoor related. And as the vet said, it could vary and the tests are not perfect, so her next one would be different set of 40.