If you have a horse with IR, EMS, Cushing's, or another metabolic concern, here are the proper treats for insulin-resistant horses: Strawberries. Celery. Apple Peels. Commerical Low Starch Treats. Pumpkin Seeds. Chopped Low-NSC Forage. Watermelon Rinds. Molasses-Free Beet Pulp. More items... 21 Apr 2022