When you gut him tested, what was he allergic to? I know that Spencer is allergic to chicken in kibble and a lot of dogs are much more sensitive than he is. A lot of the fish based foods tend to have chicken fat in them as well. Usually when your dog reacts to multiple kibbles, people will say to go RAW (not that it is a bad thing, just some owners don't feel comfortable feeding RAW). You need to compare what has been in each of the foods you are feeding and see if there are any similarities. What are his reactions to the food when you feed it?
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