If she's allergic to many foods, you may want to switch her to something like Wellness Fish and Potato or Nature's Recipe Venison & Rice. Many dogs are also developing allergies to the protein sources (the meat) in foods and both of those foods have novel protein sources. There's also a duck & potato formula (can't remember the manufacturer right now), but I find that the Venison and Rice formula is working really good for Chester. It's also very comparable in price with Nutro.