I have two dogs, one is allergic to a lot of things, including some foods and a lot of environmental things. My other dog is allergic to nothing that I know of, but he gets switched to all the hypoallergenic stuff to make life easier. The funny thing is, he sneezes every time he eats these. My vet is not at all worried about and does not believe it is an allergy to the pill pockets, but it makes me laugh every time.