Harman and Ising had maintained the rights to the Bosko character, and they signed a deal with Metro-Goldwyn-Mayer to start a new series of Bosko shorts in 1934. The two maintained the same division of work they had used at Warner Bros.: Harman worked on Bosko shorts, and Ising directed one-shots. They also tried unsuccessfully to create new cartoon stars for their new distributors. Their cartoons, though technically superior to those they had made for Schlesinger at Warner's, were still music-driven shorts with little to no plot. When the new "Happy Harmonies" series ran significantly over-budget in 1937, MGM fired Harman and Ising and established its own in-house studio, the Metro-Goldwyn-Mayer cartoon studio, which was headed by Fred Quimby.