Trivia: Steven Spielberg was originally going to make this movie a live action movie with Snowy computer generated.
Trivia: During the title credits, a rocket can be seen in the background of one shot. This is a reference to the book The Adventures of Tintin: Destination Moon.
Trivia: The film did not do well in the United States because the comics are almost unknown in America.
Trivia: This was the first non-Pixar film to win the Golden Globe Award for Best Animated Picture.
Chosen answer: He must have thought that Snowy had found the magnifying glass and was playing with it. Like most dogs would do with a toy.