Carter wandered most of his life for no real reason. He's always been somewhat aloof, and lost in thought. In that thought he physically wanders. To the point he wandered from his home pack and ran into Tala. He was hungry at the time and she shared a couple morsels with him. He needed a pack to call his own and was suggested that he help out with Akela in building her pack. Now less aloof, he hunts and helps with day-to-day pack duties.