My old dog had multiple contact allergies and suffered miserably esp since we were living in Darwin, which is rife with allergens. We did the allergy testing and spent thousands doing desentising injections, creams, shampoos, EPO supplements, everything, until the vet admitted there was nothing else they could do. She was literally raw and bald in places. In a desperation, I rang a naturopath I trusted in Darwin, to ask whether he knew of anyone who might see her, described the symptoms, and he said - "I know the symptoms you are talking about, my dog (I think it was a lab or similar) suffered too but I cured it using mineral supplements." He then gave me jars of 2 blackmores practitioner mineral supplements (sorry but I forget which ones) and I started giving them to my dog every day. Within a couple of days she stopped scratching, and the skin started to heal, after about 10 days the hair in the bald patches started growing back. I continued with the supplements, finishing the course (over a couple of months) and she never had a problem EVER AGAIN. I kid you not...it was a mineral deficiency. If you're interested PM me, the naturopath still practices in Darwin, I'm sure he would be happy to speak to you over the phone/supply the supplements.