One of the show's creators made a cartoon about a retarded pig. Boomhauer's voice is based on the voice of an angry viewer who called when he was offended by the cartoon. See more...
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Continuity: When Hank Hill decides to take his son, Bobby, to shoot a deer at a local recreational resort named La Grunta, Hank shows Bobby what is supposedly a La Grunta brochure, but the description at the bottom-right of the brochure states that the text therein is referring to the "Shropshire House Inn & Resort."