Audio problem: On the way back to the house, in the back of the horse cart, Babe and Fly are talking to each other. They never open their mouths while they're talking.
Audio problem: There are a few points throughout the film when the animals talk, but their mouths don't move.
Answer: Personality traits of brothers and sisters are not necessarily the same, even if the parents provide a stable environment for their children to grow up. The grandson could just easily been the spoiled brat of the family. In the context of the movie, one of the grandkids had to be the spoiled brat to carry the story along and show the love of the grand parents for them, even if one of them did not appreciate the hand made doll house he built for her.
Scott215