Years pass and Animal Farm expands its boundaries after Napoleon purchases two fields from another neighboring farmer, Pilkington. Life for all the animals (except the pigs) is harsh. Eventually, the pigs begin walking on their hind legs and take on many other qualities of their former human oppressors. The Seven Commandments are reduced to a single law: "All Animals Are Equal / But Some Are More Equal Than Others." The novel ends with Pilkington sharing drinks with the pigs in Jones' house. Napoleon changes the name of the farm back to Manor Farm and quarrels with Pilkington during a card game in which both of them try to play the ace of spades. As other animals watch the scene from outside the window, they cannot tell the pigs from the humans.