Some of the footage was from a cartoon never finished: "For He's a Jolly Good Fala". That cartoon featured Franklin D. Roosevelt who died during production.
The White House can be glimpsed in the background of the heroic dog newspaper photo.
The burglar calls Shep a quisling, another name for a turncoat. It comes from the Norwegian politician, Vidkun Quisling, who was a Nazi collaborator in WW2.