VetriScience Laboratories 3 PACK GlycoFlex 1 (360 SOFT CHEWS) 3 PACK Glyco Flex I with Free 60 count Joint Treats. These delicious, chicken-flavored, soft chews are recommended to provide maximum support for joint function and connective tissue health in dogs with severe joint dysfunction GLYCO-FLEX I represents Stage I of our comprehensive stage of life program for joint support. It's also recommended by veterinarians for puppies and large breed dogs