Legend of Coyote Rock, The (film) Pluto cartoon; released on August 24, 1945. Directed by Charles Nichols. Pluto is charged with guarding lambs, but a coyote lures him far away in the desert. While Pluto is gone, the coyote captures all of the lambs in a cave, except for a little black lamb who manages to escape. Pluto returns to the scene and chases the coyote, who falls off a cliff, knocking over rock formations, and the tumbling rocks settle in his likeness to become Coyote Rock.