A dose of some oats and oftenly fresh corn grain
Horses in heavy work require more nutrition and calories than a horse who spends his days at rest.
Frequently exercised horses need extra minerals and grain.
Salt
calories and salt
horses that are frequently exercised need feed with higher fiber and less suger,
Extra food for energy.
they need lots jumps and they need lots of troting polls
if they are walking on a rough terrain then they will need horseshoes. these can be put on by a farrier.
Oats and grains are high energy foods, great for horses that get frequent exercize.
increased fat
on howrse the answer is increased protein and carb.
Horses are herd (groups) animals, and as such need the company of other horses or animals. Race horses frequently have "pets" that travel with them that give them the socialization and company they need. Goats and cats are popular choices.