Clover is suspicious of Mollie's relationship with the nearby farmer. Mollie weakly denies her connection and leaves the farm 3 days later. No one speaks of her ever again.
Snowball and Napoleon always seem to be disagreeing with each other, and if one of them suggested one thing the other was bound to suggest the opposite.
One of their biggest conflicts was over the windmill. Snowball suggested building a windmill to make the animals' lives easier and starts making sketches and plans.
Snowball finishes his plans and the animals gather to vote for or against the windmill. Napoleon advises not to vote for the windmill with a short speech but Snowball delivers a passionate speech about the windmill.
It is clear who the animals will vote for, but Napoleon lets out a high-pitched whistle, summons his dogs, and chases Snowball out of Animal Farm. Snowball escapes just in time.
Napoleon goes back in the barn surrounded by his dogs, and announces that all the Sunday morning meetings would be abolished, and only a special committee of pigs would be allowed to make decisions from now on.