 In the first theatrical trailer, Roddy was not the only pet of the  little human girl. There was also a cage with two small yellow  gerbils, who seemed to be Roddys menservants. However, in the final  cut of the film, these two characters were removed, probably to  advance the story, and make Roddy appear to be a character who is  more "alone" than "spoiled". The first trailer also shows the  discovery of Sid during the day instead of late at night.