I would personally do a slow transition to a formula like Nutramigen or Alimentum first, and then maybe Good Start, just to see if she can tolerate the hydolyzed cow’s milk protein. I think our society puts WAY too much emphasis on cow’s milk, when so many of our little ones just can’t tolerate it. Is she getting any hidden dairy from other food sources (like milk products in baking, crackers, margarine, etc.)? That’s something I would try first as well, to see how she does before trialing whole milk.