All Catswell products are made from premium, natural ingredients with one catch - unlike most food available for pets, Catswell products come in a variety of functional formulas that are healthy for your cat. Give your cat something to wiggle about. Happy Hips is fortified with Glucosamine & Chondroitin to help maintain your cats's healthy hips and joints. Salmon is rich in omega 3 essential fatty acids, which contain DHA, a good source for healthy growth development. It is low in fat, high in protein and a good alternative for pets with allergies and sensitive stomachs. Vitamin E is an antioxidant rich essential fat soluble vitamin. Vitamin E keeps the connective tissues strong and prevents skin and muscles from losing elasticity.