- Someone counted all black spots in the movie, frame-by-frame, and reached the total of 6,469,952.
- Several of the characters from Lady and the Tramp (1955) can be seen in a pet shop window during the twilight bark sequence.
- At one point Jasper and Horace's TV set features Disney's award-winning cartoon short Flowers and Trees (1932).
- When the Baduns are talking on the phone to Cruella, they are holding a newspaper. The only headline on the front page (apart from the dognapping) is CARLSEN SPEAKS, and a picture of a capsized ship. This helps us to date the story, since the Carlsen in question is Kurt Carlsen, captain of the freighter Flying Enterprise, which sank after a prolonged struggle in the Atlantic. This was the media event of the year in 1952.
- The first Disney feature film to use photocopying technology (Xerography), which made an animated film with this much visual complexity possible. It also set the visual style of Disney animation (a scratchy, hard outline look) for years until the technology advanced enough (with the production of Rescuers, The (1977)) to allow a softer look.
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