The end credits attached to this episode online and on DVD may belong to another episode. Two actors who don't appear are listed in the cast and one guest performer who does appear is uncredited.
The box of dog biscuits in Sam Drucker's store is clearly a box of Milk Bone dog biscuits with the brand name covered up.
This is the fourth of five appearances Bob Hastings makes in the series, and the first of two times he appears as the sheriff, the other time occurring later this same season in The Spot Remover (1971). In past seasons, like this one, each of his appearances take on the role of a character in some service profession: a state trooper, an army officer, a telephone repairman.