פירוש על קידושין 44:12

According to the baraita, one does not acquire a slave by calling him and having him come to him. However, according to another baraita, one that discusses acquiring animals, one can acquire an animal by calling it to him. This baraita describes two ways to acquire an animal—mesirah, which is physically taking control of the animal, and meshikhah, which is causing it to go in a certain direction. Thus there is a contradiction between the baraita concerning animals and the one concerning slaves.