Chesty has allergies so he is on a grain free diet and the vet said he also may have an allergy to chicken so to remove that from his diet. I did and he seems to be doing better. Right now he is on Taste of the Wild Southwest canyon canine formula. Its grain and chicken free but i worry about cross contamination and he doesn't seem as interested in it...any ideas what would be good to try? and preferably small kernel dog food because chesty does not like to chew his food.