The animals are not happy with working on Mr. Jones farm because everything they make on the farm he takes. He also does not really feed them. But at first, not all of the animals viewed it that way. Snowball convinced all the animals that they are being used and in the end, they all agreed. So they made a plan to break free.
After breaking free the animals took over the farm and the animals changed the rules of the farm. They also planned attacks so that they would able to keep the humans away.
Then in October, the farmers went to the farm to try to recapture it. Snowball knew this was coming so he did multiple attacks to the humans to kill them. Eventually, the animals won and only was sheep were killed. All the humans ran away after.
Next, Snowball gets chased out of the farm by Napoleon's dogs. After that, the human's attack in "The battle of the Windmill". They blew up the windmill and the animals had to start building it all over again. Also, Napoleon started changing the 7 Commandments to things that would only benefit the pigs.
While rebuilding the farm Boxer overworks himself and ends up collapsing. When the animals though that a truck was coming to help Boxer it was actually the knacker and was going to take Boxer to his death. Some of the animals tried to warn Boxer what was happening but it was too late. They never saw or heard from him again.
The Pigs shocked the rest of the animals by walking on two legs and trying to convince that "four legs are good but two legs are better". The pigs and the animals finally come to an agreement that it is better to be friends then be enemies. They start playing cards and drinking and they even changed the name of the farm back to" the Manor farm" but suddenly when napoleon cheats in the card game it changes what the farmers think of them. And the other animals are realizing that they are becoming just like Mr.Jones instead of acting like animals.