Yes – providing it is fibre based. The advice is to give a scoop of chopped fibre within 30 minutes prior to exercise. This recommendation is given to make sure that the fibrous mat within the horse’s stomach is maintained to reduce acid splashing about in the stomach. Acid splash in the squamous or non-glandular lining of the horse’s stomach is linked to gastric ulceration. Ideally this chopped fibre should include alfalfa as research has shown that alfalfa particularly is a superior buffer to acidity within the digestive tract.