When a dog is diagnosed as “allergic to chicken,” in almost all instances (there are exceptions of course) the allergy is to chicken protein. Great Lakes original canine formula with pork meal does NOT contain chicken protein. The natural preservative used is chicken fat with Vitamin E (mixed tocopherals), but fat is not protein and rarely causes allergy issues. If your dog has sensitivity to chicken protein, please try our original grain free formula with pork meal. It is highly palatable and may be a great, affordable addition to your sensitive pup’s pantry!