Flexadin Advanced Chews with UC-II ® for cats and dogs is an innovative supplement that supports healthy joints and flexibility. Flexadin Advanced features UC-II ®, an undenatured type II collagen derived from chicken cartilage sternum. It is different from traditional supplements that contain glucosamine and chondroitin, in that it’s only one chew per day for any dog or cat and works differently to target the pet's immune system. Supports healthy joints and flexibility Formulated with UC-II ® Works differently than glucoasmine and chondroitin products by targeting the dog or cat's immune system Only 1 chew per day, regardless of pet's bodyweight or size Flexadin Advanced is a highly palatable soft chew, readily accepted by 94% of dogs and 74% of cats! Flexadin Advanced is available in 30ct and 60ct packages.