Dr. John Hypoallergenic Duck and salmon recipe is a hypoallergenic recipe made without added wheat and any form of chicken (including chicken fat). With 14% duck and 14% salmon this recipe provides healthy protein and essential fats with a crunchy base of rice and barley for easy digestion. Dr. John Hypoallergenic Duck and Salmon is designed to help support working dogs with sensitive stomachs or those with difficulty digesting wheat or chicken.