FourFriends Single Protein Tuna with Sweet Potato contains tuna as the only protein source and also has sweet potato as an alternative hypoallergenic carbohydrate source. This version is also enriched with salmon oil.FourFriends Single Protein is specially formulated for adult dogs who have sensitivities to certain ingredients or a sensitive stomach. The range has only one animal protein source. The recipe contains no GMOs, sugar, soy, grains, chemical preservatives or unnecessary additives.Facts about Four Friends Single Protein Tuna & Sweet Potato:Suitable for dogs with sensitivities to certain ingredients or sensitive stomachs.Tuna as the only source of protein.The Single Protein range has only one source of protein.Contains no sugar, soy, GMOs, grains, chemical preservatives or unnecessary additives.