At Disney, Blair animated cartoon short subjects, Mickey Mouse scenes in "The Sorcerer's Apprentice" section of Fantasia, and the hippo-alligator dance in Fantasia's "Dance of the Hours" sequence. He also did some work on Disney's Pinocchio and Bambi, as well as the cartoon shorts The Whalers, Beach Picnic and Sea Scouts. Blair left Disney after the 1941 Disney animator's strike, and was hired to work for Tex Avery's unit at MGM.