How does Orwell present changes to the end of the novel.

By the end of the novel, most of the animals are in indentured servitude to the pigs. The pigs walk around on two legs, sleep in beds, and live in houses, drink, and gamble. They basically break every commandment that Old Major originally envisioned for all the animals. The pigs have turned Old Major's vision for a utopia into an autocratic totalitarian state.

> Explore the ways in which Orwell does this?

I know what happens at the end, I need techniques and how Orwell presents the end of the novel.