sentences:  Originally barred by Quimby from making a second cat-and-mouse short until the overwhelming success of "Puss Gets the Boot" demanded it, Hanna and Barbera and their team of animators, who included George Gordon, Jack Zander, Kenneth Muse, Irven Spence, Ed Barge, Ray Patterson and Pete Burness, worked on nothing but "Tom & Jerry" cartoons from 1941 until 1955.Exceptions were half a dozen one-shot theatrical shorts, including "Gallopin' Gals" (1940), "Officer Pooch" (1941), "War Dogs" (1943), "Good Will to Men" (1955), and the last seven Tex Avery shorts featuring "Droopy".Key to the successes of "Tom and Jerry" and other MGM cartoons was the work of Scott Bradley, who scored virtually all of the cartoons for the studio from 1934 to 1957.