Ulcers are best treated with a medication that suppresses stomach acid production. Prevention of recurrence includes decreasing risk factors. Free-choice forage is often the best way to minimize ulcers. Provide regular, smaller feedings of grain ratios that include a high percentage of fat and digestible fiber. Try to limit starch and sugar intake. Your veterinarian can help you customize a ration for your horse. If your horse must be stalled, make sure it has other horses close by to socialize with.