 Dalton later admitted feeling aggrieved about the fact that while he was meant to be nominally in charge of Freleng's former unit, he tended to be overshadowed by the presence of the more experienced Hardaway.Cal Dalton's major contribution to the legacy of Warner Bros. animation was having co-directed "Hare-um Scare-um" in 1939 with Hardaway.The short featured a gray and white rabbit that served as the prototype for Bugs Bunny.