Mad Barn 3:1 Zinc CopperThe 3: 1 Zinc Copper supplement provides two essential trace minerals in an ideal balance to help maintain healthy skin, coat, and hooves in horses Supplying these minerals in a three to one ratio supports optimal absorption in the gut Horses with high iron intake, weak hoof structure, or metabolic problems might benefit from additional zinc and copper in the diet One scoop supplies the recommended 300 mg of zinc and 100 mg copper for a 500 kg horse