Oswald the Lucky Rabbit time, Felix the Cat and Krazy Kat. Universal was given the right to name the rabbit and it selected a name out of a hat. The first Oswald cartoon, "Poor Papa", was rejected by the Universal studio heads for its poor production quality and the sloppiness and age of Oswald. Disney, together with Iwerks, decided to create a second cartoon titled "Trolley Troubles" featuring a much younger, neater Oswald. The short, released on September 5, 1927, officially launched the series and proved to be Disney's greatest success to date. The storyline for Poor Papa was reused in a Mickey Mouse
Oswald the Lucky Rabbit stories themselves became softer. Minor changes in the drawing style would continue, too. With "Happy Scouts" (1938), the second-to-last Oswald film produced, the rabbit's fur went from being all-white to a combination of white and gray. Unlike the Disney shorts, in which Oswald did not speak, Lantz's cartoons began to feature actual dialogue for Oswald, although most of the cartoons were still silent to begin with. Animator Bill Nolan did the voice of Oswald in "Cold Turkey", the first Lantz cartoon with dialogue, and the following year Pinto Colvig, who was working as an animator and gag man at the