The allergy testing takes about a week. Food allergy testing is not as accurate as testing for molds and dander. Move the dogs food bowls to a dry place, like a hallway, away from radiators. Purina and Hills have great hypo allergenic diets and treats. You would be suprised on what dogs are allergic to, I knew a dog that came in with were raw skin, her biggest allergy was human dander, go figure. She stopped sleeping in bed with her owners and in now on alergy injections specialy made for her allergy and is doing great. Good Luck.