Contains psyllium husk powder, a revolutionary bulk forming natural fibre derived from psyllium seeds. Once in the horse's digestive tract, psyllium forms a fibrous gel which adheres to the sand particles preventing them from staying in the gut and causing potential blockages. Its bulk forming capacity encourages movement by peristalsis, aiding the removal of blockages from the horse's digestive tract. Aniseed flavouring has been added for palatability.