Running Wild (Upchuck and the Rotten Willy)

Chuck is thrilled to have two new playmates, the new gray cat Roscoe and his sister Rikki. But Roscoe and Rikki think dogs are awful -- and Chuck's best friend is Willy, the Rottweiler who saved his life. Willy's wise enough to say, It's okay to have more than one friend, but things aren't quite that simple. Chuck fears he'll end up with no friends at all -- until a happy surprise promises to keep the two best pals together forever.