Out from the door of the farmhouse came a long file of pigs, all walking on their hind legs…out came Napoleon himself, majestically upright, casting haughty glances from side to side, and with his dogs gambolling round him.
He carried a whip in his trotter.

George Orwell

Animal Farm. Chapter 10. The transformation is complete. The animals are terrified and amazed at the sight of the pigs, who are now indistinguishable from the humans that once oppressed them.