I sprinkle a little crimped oats on my horse's grass hay pellets whenever she think they're getting a little boring. I also add apple cider vinegar to the soaking water for the pellets, so that gives it some extra flavor.

My horse lost weight last fall and we brought her back with more hay, crimped oats, and grass hay pellets. I got away from senior feed b/c the only kind I can get around here is simply full of sugar. She got the hay and oats every day fed by the BO, and I fed her the hay pellets whenever I came out (usually every day). I supplement her with kelp meal, MSM, Vits E&C, and intermittently borax. I can give you amounts if you are interested.