Mr. Jones is always drunk and he doesn't take care of his animals on the farm. The animals need to do everything themselves and they also need to care for each other.
During this, the animals are sick and tired of the way Mr. Jones is treating them so they all run away because they need to find a better living environment where they can actually eat and have basic living essentials.
The animals find a new farm where they can provide a healthy lifestyle for themselves. They also aren't going to be harmed by Mr.Jones anymore. The next thing that happens is the battle of cowshed. The animals and humans fight against each other for power and land.
During this scene, Napolean got very furious with Snowball so he used his dog whistle to call in his big dogs that he took from there mothers when they were babies and the dogs chased Snowball off the farm. A little later in the chapter, there was a big storm that hit the farm and the windmill was destroyed. Napoleon is convinced Snowball ruined the windmill.
In the falling action, the windmill gets blown up by the humans for power. Boxer is also tricked by Napoleon and thinks he is going to the hospital but he is really getting taken to the "Knacker" where he gets slaughtered. All of the animals know because they were watching him leave in the van and they were shouting, "Get out! Get out! your going to your death boxer!" Benjamen figures it out because the house where he was going said "Knacker" and he recognized what that was.
Your going to die!
Get out Boxer!
The pigs have officially taken control and they are playing cards and both the humans and pigs place down an ace of spades, which means one has cheated. The animals couldn't even tell the apart and now the Animal Farm has gone back to "Manor Farm".