Sea Flex comes to us from the same folks that make the wonderful and effective Sea Jerky for Dogs. These healthy treats contain glucosamine, chondroiton, taurine, catnip, poultry, etc. and are rich in omega-3 marine fatty acids. This formula is recommended in The Veterinarian's Guide to Natural Remedies for Cats by Martin Zucker. Please Note: We have raised the price slightly on this item because of the increased shipping weight. If you are comparing our price...please make sure you compare us to the final checkout price (including shipping and handling!).