Never heard of it. Let me guess saliva/hair test? Or, the blood test done by the veterinarian that has examined and is treating your dog?
Either way, if your dog’s allergy issues are serious, you will have the best results by consulting a veterinary dermatologist.
It may be cost effective in the long run.
Trust me, there is no cheap way out of this, no miracle cures that I am aware of.
Maybe you will find this site helpful
http://skeptvet.com/Blog/
Use the search engine there to look up specific topics. Good luck
