George becomes visibly nervous. Their behavior strikes the boss as suspicious, and he asks why George feels the need to take such good care of his companion. He wonders if George is taking advantage of a man who lacks the faculties to take care of himself. George replies that Lennie is his cousin and was kicked in the head by a horse when he was young, so George has to look out for him. The boss remains suspicious and warns George not to try to pull anything over on him. Nonetheless, they are assigned to one of the grain teams, working under a man named Slim.