Above all, the tune and even the words of Beasts of England were known everywhere ... the blackbirds whistled it in the hedges, the pigeons cooed it in the elms, it got into the din of the smithies and the tune of the church bells. And when the human beings listened to it, they secretly trembled, hearing in it a prophecy of their future doom

Hi

George Orwell's Farm Rebellion book describes animals that live in a totalitarian system where a human exploits them, giving animals what little they need for their support. The animals submit, because the human is the one who feeds and maintains, all for his benefit. This is how in totalitarian regimes, the owner is the one who benefits from the work of others. In the book, there are some animals smarter than others; For example, pigs are the most intelligent and the horse has very little learning capacity.