The Lastest Gun in the West

Frank Welker left the show after recording animal vocal effects for this episode, since the increasingly "wacky" characterizations requested by the producers were hurting his throat and the network was unwilling to give him a raise as compensation for his efforts. The role of Santa's Little Helper was subsequently given to Dan Castellaneta, while Welker did return for a guest appearance in 2014 during a crossover with Futurama (1999), where he voices Nibbler.

References Sierra Madren aarre (1948)