George Maestri, a writer for the series, stated that his favorite episode is "The Good, The Bad, and The Wallaby" because the episode was the first that he wrote. In the original version of the episode Heffer encounters a milking machine and has a brief affair with it; he experiences an orgasm while with the machine.
Murray co-produced the pilot episode with Maestri, Marty McNamara, and Nick Jennings at Joe Murray Studio in Saratoga, California, United States. McNamara assembled a cadre of animators. Murray animated half of the pilot, and several San Francisco Bay-area animators such as Robert Scull , Maestri, Jennings , and Timothy Björklund animated the other half. Jennings created all of the production backgrounds.
Murray hired a camera company. Once the plan fell behind schedule, Murray, Nick Jennings, and George Maestri modified a 35 millimeter camera to film during the night. Tom Schott acted as the cameraman. In the daytime the team transported the film via automobile to San Francisco for processing. After viewing the completed portions, the team arrived in Saratoga to continue the production. Murray rented a motel room for team members to take shifts sleeping and showering ; Murray, Jennings, Maestri, and Schott took shifts at the motel. Policemen visited the animators on numerous occasions due to noise produced by the studio.
The team completed the film on schedule; the crew later expanded the film to 11 minutes for use in the series. Murray describes the animation of "Trash-O-Madness" as containing "variations in the Rocko models" and "a lot more stretch than usual" in the animation.