In addition to classical Tom and Jerry shorts, Hanna and Barbera also produced/directed for "MGM cartoon studio" half a dozen "one-shot theatrical shorts" besides it, including "Gallopin' Gals" (1940), "Officer Pooch" (1941), "War Dogs" (1943) and "Good Will to Men" (a remake of Peace on Earth, 1955). Fred Quimby retired in 1955, with Hanna and Barbera replacing him in charge of the remaining MGM cartoons (including the last seven Tex Avery's "Droopy episodes") until 1958, when the studio shut down, ending all the animation productions, the duo started the "Hanna-Barbera" animated television series company afterwards.