How do you treat a horse for upset stomach?

If you suspect your horse has gastrointestinal distress, you should start keeping a time log of what you are seeing. For example, write down at 8:34 AM that your horse was pacing restlessly. Second, call your veterinarian and let him/her know what you are seeing - he/she may need to come out immediately on emergency call for colic. Third, get a halter and lead rope on your horse and start hand walking him/her around a pasture or small riding arena with no one else in it. Keep your horse walking at a slow but steady pace. Keep your phone by you in case you need to call the vet back or your vet calls to ask for an update.

Mild colic can often be treated on site, either by helping your horse work its way through the issue or with medical treatment on site by your veterinarian. However, some colic issues have to be treated surgically - not a cheap option, and it often involves transporting your horse for several hours or more in a horse trailer that he/she is trying to kick apart.