Nutritional digestion & stress formula. This unique "prebiotic" supplement combines yeast culture products scientifically proven to enhance fiber digestion & overall feed efficiency in horses. This product is great for any horse, but especially those prone to digestive disturbances such as diarrhea, colic or laminitis, feed changes, stressful training, or for the older horse. Helps reduce "hay belly" too! Available as a palatable granular in 10 lb. bucket (80 day supply) or 20 lb. bucket (160 day supply).