Feeding your horse to control behaviour is a common question we get here at Pryde's. The simple answer? Don't feed too much! It is so important to match your horse's calorie intake with their calorie requirements.
1:28 Don't feed anything that will cause excess fermentation of starch/sugars in the hindgut. An example would be if you are feeding grains only, make sure that they are well cooked and easily digested in the small intestine.
1:50 Don't be afraid to change the amount you feed on a daily basis according to how much work they are doing each day.
2:43 The type of feed you use may make a difference in some horses. If your horse seems reactive to grain-based feed, try a fibre and oil-based feed (some example EasiSport and EasiOil).