The practice of using a lucky rabbit's foot is usually depicted as something that only applies to people owning the feet of dead rabbits. (The former version does have the advantage of providing an answer to the point made in the page quote.) However, in other practices, just any old rabbit foot will do. In some traditions, the rabbit from which the foot is obtained must have certain properties and be killed in a certain way. A variety of cultures use the foot of a rabbit as a good luck charm. This trope refers to the association between rabbits and luck.
