Wysong Anergen Canine/Feline Formula Dry Dog/Cat Food A Lamb-Based Pet Food Formulated For Animals With Allergic Sensitivities High Levels Of Prebiotics, Omega-3S, And Enzymes Lean Proteins With A Low Glycemic Index No Artificial Additives Or Nutrients. Suitable For Cats And Dogs Of All Sizes, Life Stages, And Breeds Wysong Has Been A Leader In Pet Nutrition Since 1979