There use to a beet pulp sweet feed called Sweet Rely. Towners Big Guy ate it as he had multiple allergies, also bedded on rice hulls and ate soaked hay cubes. Some of his colts were also put on it when I was working for Dick WilliamsII They weren't allergy tested but some of what they learned from Towner's they applied to a few colts. Can't say if it helped or not I didn't take care of those colts.