My dachshund is currently on Royal Canine h/p prescription diet (hypoallergenic hydrolyzed protein). After a few years of this diet I tried replacing it with Royal Canine Dachshund 28. I was pleased that the Dachshund 28 formula did not upset his stomach at all, or create allergies or diarrhea. The only problem was that he still greatly preferred the taste of h/p. Dachshund 28 is almost as expensive as h/p, not much difference in price so we went back to h/p after he finished the bag of Dachshund 28. I would still recommend this food based on the observation that my very sensitive, allergy-prone dog did well on it.