The rabbit foot began its lucky trend because of the rabbit's ability to reproduce, the rabbit's foot became a symbol of fertility.
By owning a rabbit's foot as a talisman, you would have vital connections with many powerful forces.
A left rabbit hind foot, carried in the left pocket after having been removed from a rabbit that was killed during a full moon by a cross-eyed person is truly lucky. The foot is considered a powerful charm against evil because the rabbit's strong hind legs
Added bonus: In Wales an old belief is that a new-born child rubbed all over with a rabbit's foot will be lucky for life.