Kalmbach Feeds Tribute Essential K for Horse, 50 lb Low feeding rate results in low NSC and low calorie intake ideal for horses with metabolic conditions Low cost per day. Dense nutrient concentration makes it the lowest cost method of applying the most critical nutrients Optimal balance of essential amino acids for growth 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