PETS OWN SHARK CARTILAGE IS THE CARTILAGE FROM 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 QUOTAS, SO NO SHARKS SUFFER SPECIFICALLY FOR OUR PRODUCT.