Sundown Products make Nutritionally Improved Straw (NIS) pellets. NIS is a palatable, alkaline, digestible forage fibre pellet which can help maintain rumen function and therefore butter fat percentage in high starch and/or sugar diets. Typical application in Ireland is too include NIS in the diet when cows are grazing lush spring grass. Fibre from forage is twice as effective at maintaining butter fat than fibre from non-forage sources. Feeding NIS will not reduce dmi'NIS is 30% more digestible than chopped' straw'.