Minecraft wiki entry for Horse, associated text: Horses wander aimlessly, occasionally stopping to rear, flick their tails, or lower their heads as though eating the grass. Unlike sheep, the eating animation does not actually cause any grass to be consumed. If a player comes near, the horses may turn to look at them. Any horse, even a wild or undead horse, can be attached to a lead without protest, although an untamed horse rears and flails its forelegs if saddled. Horses remain passive, even when hit.