turkey?

so last night i gave ruby just turkey and acidophilus powder for dinner.. she has been on a food elimination diet, and still itching/scratching.. after getting a pound of turkey she BARELY itched at all.. just twice after dinner between 6-11pm, and it wasnt that bad... i am wondering if she is allergic to chicken, since being on the chicken she was still itching... i also bought Tide FREE dermatologist tested laundry detergent, and have been rewashing all bedding and our bedding as well... tonight we will try turkey again, and if she does fine with turkey, i am going to stock up on turkey for her...