What great change happened at the end of chapter 7 in animal farm?

At the end of Chapter 7 in "Animal Farm," the animals face severe hardships, including starvation and oppression, as the pigs consolidate power. Napoleon engages in brutal tactics to maintain control, including executing dissenters and spreading false Propaganda. The commandments of Animalism are altered to justify the pigs' actions, culminating in the chilling realization that the farm's principles have been corrupted. The animals' hope for a better life is shattered, as they can no longer distinguish between their leaders and the oppressive humans they once overthrew.