) Pro-Tendon EQ is formulated to help support healthy cartilage and connective tissue in horses. With supplemental collagen and silicon to help maintain healthy collagen levels. Contains 6000 mg MSM, 2000 mg hydrolyzed collagen, 500 mg silicon, 500 mg Ester-C, and chelated minerals. Feed 2 to 4 oz. daily for 14-21 days, then 1 to 2 oz. daily for maintenance. Pellets.