Hold the food item in your hand
Approach the horse
Right-click or tap the horse to feed it
Use wheat to restore a small amount of health
Use sugar to restore a small amount of health and help tame the horse
Use apples to restore more health
Use golden apples to restore health and help tame the horse
Use golden carrots to restore health and help tame the horse
Use hay bales to restore a large amount of health
Feed the horse only when it is not already at full health
Feed the horse while mounted to keep it healthy if needed