Animals herd, carry, pull, and even . . . keep us company! This nonfiction, easy-to-read picture book transports readers from an open field to a desert to a snowy tundra as animals of all kinds perform some very important work. The book ends with an endearing role reversal as a young boy gives milk to his cat, reminding readers that just as animals help people, people in turn can help animals. This book teaches readers about the variety of work animals and depicts the give-and-take of human/animal relationships. A map is included. Guided Reading Level C.