On any film, there are sequences scripted that don't make the final cut. The truth is that every script is academic until you hang the reels (assembling a rough cut of the film in storyboard), it's only at that point that the film begins to reveal itself, and really it's only at that point you know what you have. This is why we storyboard so completely on animated films. These are usually very expensive projects, so we try to leave as little as possible to chance.
When a scene is cut, it's usually for a simple reason like pacing; a scene is playing too long, and we want to get to the meat of the action quicker. Sometimes the scene is pulling the film in a direction that the film-makers want to avoid; it might play too dark, or it might be hinting at something that the film-makers don't feel we should explore, so we simplify the story beats and go in another direction. But most of the time it's because even though the scene might be a good one, it doesn't really add anything to the over-all picture, and we could do something a little more interesting. This was one such case. The scene picks up right after Sparky's Day Out- found here:
The amazing Sharon Smith and I worked on this scene at different times in the production, so a number of her panels are included here- annotated with the usual red dot:)