I know a lot of people have negative feelings about the dog advisor website but I learned a lot about ingredients from him. I understand he is "just a dentist" but he does his research in good faith. His 5 star foods have more protein than I want for my little one but I study the ingredients in foods to make a decision. If he lists an ingredient in red, I pay attention. My goal has been finding a good food with the least amount of red
Ali's dry food is Acana. They sell tiny bags (less than a pound) so we can have a couple flavors in the house.
Here is a good article about food allergies. Good luck!
Hypoallergenic Dog Foods