At first Roz knew nothing about cattle, but she set to work in a careful, way, learning the farm step by step. Soon she was the herd from morning to night — feeding, guiding, and watching over every animal. The cows, once frightened, found her calm and , always there when they needed her. Roz was to each one's health, noticing trouble before anyone else could. Day by day she began to into the life of the farm, until robot and cattle could happily in the same barn.