Despite the efforts for progress in Animal Farm, animals do not feel any better than when they were under the humans. Why?
At first life does seem better than under the humans. But by the end of the book it is clear to the reader that they are not any better off than before the revolution. This is because the pigs have arrogated many of the same powers and privileges to themselves that the humans exercised. They are just as tyrannical and violent as Jones and his workers, and they actually experience much greater food shortages and heavier work loads than they did before. That the pigs have corrupted the purpose of the revolution becomes obvious at the end of the book, when they are physically indistinguishable from the humans. But the real tragedy of Animal Farm is that the animals, even those who were old enough to remember the days of laboring under Jones, have become so indoctrinated by the rhetoric of the pigs that they generally believe themselves better off, or are unable to imagine a better life.