Kalmbach Feeds Tribute Maturity Textured Gc Plus for Horse, 50 lb Joint support. Contains glucosamine, chondroitin sulfate and MSM to support joint health and range of motion No corn formula results in lower NSC (sugar + starch) Optimal balance of essential amino acids and organic minerals to support aging and muscle maintenance With EquiFerm XL microencapsulated active dry yeast; acts as both a pre- and probiotic, increases total diet digestibility and improves overall gut health