We’re proud owners of a 12 week old blue roan male cocker called cooper. We’ve had him to vets twice in a week over him scratching and biting himself. Vet thinks it’s some form of allergy but is reluctant to test him or give him medication because of his age. We’ve also noticed a redness in eyes. We’ve been advised he may have an allergy to some foods. Has anyone any advice they can give us.