This apple and molasses flavored pellet is formulated with 100% pure psyllium seed husk to aid in removing sand and dirt from the intestinal tract. Sandpurge can be used as a top dress or fed separately to reduce gastrointestinal upset, increase gut function, and reduce the possibility of sand colic in horses and ponies. | First Companion Sandpurge Psyllium Pellet | Size 20 lbs