There are products available to reduce the incidence of horse sand colic.
Use an elevated hay feeder and place a large mat below the feeders to reduce the amount of sand ingested.
Use a sand-clearing supplement. ASSURE PLUS® is an excellent choice for overall equine gastrointestinal health. It contains whole blond psyllium husks and a range of healthy probiotics that help clear sand and support your horse's hindgut motility. ASSURE PLUS® also contains vitamins, minerals and essential amino acids in a patented formula that ensures that the ingredients get where they need to go: your horse's gut.