Have your horse examined by the vet to rule out any medical problems. Include the mouth and teeth in the exam. Then you can increase the amount of feed. Provide your horse with free access to good pasture. Lucerne hay fcan provide increased calories, start with small amounts. Increase fiber such as sugerbeet pulp, add cereal grains. Keep a close watch on your horse to see that s/he reaches the proper weight without becoming fat.
