This Is The Cartilage From The Shark Spine. It Is Pure Glucosamine & Chondroitin, Which Is Known For Its Beneficial Effect On Dogs Suffering With Arthritis Or Joint & Hip Dysplasia. It Is Also Just A Great Tasting Treat Which Aids In Dental Hygiene. We Salvage Our Cartilage From Human Sourced Quota, So No Sharks Suffer Specifically For Our Product. Your Dog Will Love And Thank You For This Treat.