What examples of power can you find in the story?

Power quotes:

The pigs did not actually work, but directed and supervised the others. With their superior knowledge it was natural that they should assume the leadership.

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But just at this moment Napoleon stood up and, casting a peculiar sidelong look at Snowball, uttered a high-pitched whimper of a kind no one had ever heard him utter before.

At this there was a terrible baying sound outside, and nine enormous dogs wearing brass-studded collars came bounding into the barn. They dashed straight for Snowball, who only sprang from his place just in time to escape their snapping jaws.

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Throughout the spring and summer they worked a sixty-hour week, and in August Napoleon announced that there would be work on Sunday afternoons as well. This work was strictly voluntary, but any animal who absented himself from it would have his rations reduced by half.