Not to sound like a commercial for Nutro food, but my dog, Nicki is allergic to many foods, and we found Nutro to be the best for her - they use all natural products and the ingredients are the GOOD stuff, no corn, etc. Switching to Nutro has kept my alergy vet visits down drastically!

Here's the link to their website
Nutro Food

You can learn about their products and sign up for a great program where you buy so many bags and get one free, and they send you a coupon book.