I have a just over 8 week old Golden Retriver and is scratching and itchy all the time, especially at night and sometimes wines when his scratching. His been vets, had flea, mite treatment blah blah, is on hypoallergenic food, has been checked by the vets but she just said dry skin. But when I mean his scratching it's constant and there no let up, it's horrible to see him so miserable and I really don't know what else to do ? Anyone?