Corrected entry: Dragon's dog, a Rottweiler, was not in the US until 1931, much later than the show.
Continuity mistake: When Matt and Chester get up in the morning, Chester is in a chair with a blanket covering him up to his chin. Camera shot changes to Matt's point of view and Chester has no blanket as he speaks. Camera shot changes back to the prior viewpoint and the blanket has reappeared. (00:21:40)
Dr. Galen 'Doc' Adams: I'll tell you why the Hagens live so long.
Festus Haggen: Why?
Dr. Galen 'Doc' Adams: 'Cause they're too dumb to know they're dead.
Trivia: Although they played father and son in this episode, Jack Elam was only six years older than Harry Dean Stanton.
Correction: The Rottweiler is considered one of the oldest breeds. It was only in 1931 that the American Kennel Club recognized the Rottweiler as an official breed. There's a difference between a breed existing and being recognized by a kennel club.
Bishop73