I believe that more than one movie has been made from the book, so you may not all be discussing the same one. As to the book, however, it is (like Nineteen Eighty-Four) a satire, written with a political purpose: to debunk Stalinism. Orwell was a socialist, and believed that if socialism was to have any chance of success, the first requirement was to dissociate it from what had happened in Russia. Animal Farm is a pretty faithful allegory of the fate of the Russian revolution. (Orwell even made a last-minute change in wording in order to be fair to Napoleon-Stalin.) Nineteen Eighty-Four is a more complicated satire, with the warning "It can happen here too, if we turn socialism into a religion".

ObSongs: In the movie version I saw, "Beasts of England" was charmingly rendered as a chorus of animal sounds.