) Pharmaceutic grade ground psyllium husks that create huge swell volume, gently surrounding the sharp granules of sand, dust and debris while lubricating their passage through the horse's system. Feed 3 heaping Tbsp. (2 oz) per day for 3 days, take 3 days off, and repeat pattern for up to 30 days. Maintain with 3 heaping Tbsp. once per week. Powder.