Zesty Paws Multifunctional Bites are functional supplement chews with premium ingredients that support physical performance, antioxidants, hip & joint, heart, immune, skin, liver, & gut health for dogs of all ages, breeds, and sizes. SKIN HEALTH & ANTIOXIDANTS For animals with sensitive skin, this formula contains Cod Liver Fish Oil and Vitamin E for skin health to help maintain normal moisture and Kaneka Q10 to help reduce oxidative stress - plus they contain no grain, corn or soy derivatives HIP, JOINT & PERFORMANCE SUPPORT - Each dog chew features OptiMSM, a premium form of MSM for muscular support, which works synergistically with the Glucosamine HCl and Chondroitin Sulfate in these chews for hip and joint support plus Cod Liver Oil and B-Complex Vitamins support normal physical performance. GUT HEALTH & PROBIOTICS - These chews also contain a five-strain Probiotic Blend (500 million CFU per chew), Enzymes, and Niacin to promote healthy digestion and gut flora while supporting normal bowel function for dogs. HEART, LIVER & IMMUNE HEALTH - Multifunctional Bites feature powerful antioxidants Kaneka Q10, a premium CoQ10, Cod Liver Oil and Vitamins A, C, & E to promote healthy cardiovascular function, support liver health and enhance immune response.