Answer:
In chapter nine the pigs are taking over Animal Farm. They are getting fatter and there are more of them. The other animals are having to work harder and the field which was set aside "retirement" of the older animals has been turned into a barley field. The pigs start a school for their young, they brew their own beer, and they use the dogs as their security force.
Explanation:
Years pass. Many animals age and die, and few recall the days before the Rebellion. The animals complete a new windmill, which is used not for generating electricity but for milling corn, a far more profitable endeavor. The farm seems to have grown richer, but only the many pigs and dogs live comfortable lives.
