Go West, Big Boy is the 27th Terrytoons cartoon released on February 22nd, 1931.
A singing mouse rides the rails until he gets booted off of the train and into the desert. He encounters a female mouse with a flock of sheep, which is being promptly stolen by vultures. The boy mouse is able to rescue all the sheep, and we iris out into the horizon.
- The working title was "Go West Young Man".