The pigs had lower food rations and their work took longer when Napoleon was in charge now. The animals didn't know what he was up to and how he is using them. He started to kill animals who pleaded guilty and made their lives horrible.
When Boxer got taken away into this truck the animals were so confused. They ran after it screaming its name, and the animals knew that something was up. On the side of the truck it said butcher. This is when the animals knew something was going on with Napoleon and how he is using them.
The falling action is when the pigs stand up on their hind legs. They were breaking and changing the commandments. It was so weird for the other animals to see the pigs walking around on their hind legs. They knew that something bad was about to happen.
The animals are now working as slaves. The farm is now called "Manor Farm." They are basically saying that pigs are equal to man. Farmer Jones and him have come to an agreement that they can't find any difference about them. Napoleon and the pigs have now broken all of the commandments and changed them.