Psyllium is high in fibre and mucilage and when combined with water it swells to many times its original size, becoming slimy and gelatinous.

By feeding Psyllium Diarrhoea is inhibited via the adsorption of excess moisture and bulking up of faeces, and constipation is alleviated by the softening of stool and the promotion of bowel movement by the extra volume.

For horses, psyllium husk’s ability to pick up sand and move it through the gut is particularly helpful for sand/dirt colic. 

Do not feed psyllium to a horse whose gut is impacted.