Vetoquinol Flexadin Advanced with UC-II for Dogs & Cats, 30 Chews Flexadin Advanced UC-II targets pets immune system and helps support healthy joints and flexibility Clinically-proven formula: Undenatured Chicken Collagen (Type II), Omega-3 Fatty Acids and Vitamin E Give only one (1) Flexadin Advanced chew per day, regardless of pet's body weight or size Omega-3 Fatty Acids may help relieve joint inflammation and Vitamin E helps promote normal cartilage Type II Collagen is a protein found in cartilage that helps support immune system and joint function