PetVi Dog Probiotic Probiotics: Live beneficial microorganisms for pets digestive and immune system health. Prebiotics: 100% pure natural sundried California alfalfa hay, protein, trace minerals and vitamins. Omega 3 fatty acid: Certified organic zinc and flaxseed for skin and coat health Helps prevent itching, scratching and shedding. Promotes vitality, shiny coat and optimal intestinal and overall health. No preservatives. Made in the U.S.A. Mixes easily with your pets food. Money back guarantee. 1 lb. bag up to 90 day supply.