The move is true to the book as to movie theaters not showing it perhaps it is because it is a nice movie, no violence and no one is hunting humans of a particular political persuasion. I love the ending especially because as a dog lover, and owner I would like to believe it is true.
I think if you saw the movie, you would actually love the ending. Yes you would cry but in a way it is a good ending and one that you might hope could be true. Basically it is the theme of the whole story.