Lead

Leashes are used to hitch animals to a fence posts or nether brick fence posts, and also to lead them around.

Right-clicking with a leash in your hand will tie it on the animal that you are facing. Only passive mobs can be "leashed", hostile mobs cannot (Intended). If leashed animals are ten or more blocks away from the player leashing them, the leash will "snap" and turn into the item.

History
Leine