Glucosamine Chondroitin MSM Antioxidants For Cats of All Sizes 6 Healing Ingredients Including All the Health Benefits of the Perna Mussel No Wheat No Corn No Artificial Ingredients Delicious. Different Veterinarian Formulated For Use in Cats Only For all Cats Quality Seal - NASC Your cat deserves the best pet supplement the world has to offer. That's what's in this package. Every Pet Naturals supplement is naturally formulated with the most pure and potent ingredients available. Why It Works Glucosamine - Supports lubrication of the joints, flexibility and mobility Perna - Offers whole food nutrients, including natural components, to support connective tissue and joint health MSM - A source of organic sulfur, which supports maintenance of connective tissue function Antioxidants - Support protection of the joints from everyday free radical damage