Sand Colic in Horses: Prevention and Emergency Welfare Management

Sand accumulation in the large colon causes chronic and acute colic with significant welfare impact in horses grazing sandy or sparse pastures.

Key Facts

• Sand accumulation in the large colon irritates the gut lining and can cause impaction colic
• Horses on sandy soils or overgrazed pastures inadvertently ingest sand with every mouthful of grass
• Signs range from chronic loose droppings and weight loss to acute severe colic
• Psyllium husk supplementation helps move accumulated sand through the gut
• Sand detection using fecal sedimentation (sand in a bucket of water) guides prevention

Welfare Considerations

Sand colic causes welfare suffering along a spectrum from chronic gut irritation with weight loss and loose droppings, to acute impaction colic with severe abdominal pain. Horses on sandy soils or sparse pastures where they must graze close to the ground are at highest risk. The welfare-effective approach requires monitoring sand accumulation using regular fecal sedimentation testing, preventive psyllium supplementation during high-risk periods, and pasture management to ensure horses always have grass rather than bare sand to graze. Acute sand colic can require intensive medical or surgical treatment — welfare management includes prompt recognition, early veterinary contact, appropriate analgesia, and gut motility support.

What You Can Do

• Monitor sand accumulation monthly using fecal sedimentation: swirl droppings in a bucket of water
• Supplement with psyllium husk for 5 days per month during high sand accumulation periods
• Ensure adequate grass coverage — horses on sparse pastures ingest the most sand
• Feed hay from nets rather than off the ground on sandy soils
• Contact your veterinarian promptly for any colic signs in horses known to be on sandy ground