Animal Farm Book and Movie

To start off, I didn't think that the movie was at all like the book. I mean, of course it had the same concept in mind, but there were a huge list of items that were very different from the book. For example, in the very beginning, when Farmer Jones was having Boxer pull along a contraption for a part of the land, Jessie (a dog) came down running a knocked over Farmer Jones because he was hurting Boxer. In the book, nothing like that happened. The book started off with Mr. Jones closing for the night and that's when all the animals were gathering for the meeting (pg 1). Jessie wasn't even mentioned in the beginning. Also, for myself, I hadn't pictured Old Major the way he was in the book (slobbery and just plain disgusting). By the way the author described Old Major, I imagined him clean, well-fed, but not that fat because of the way that he was so respected (pg. 1). A little later on in the book, I also didn't know that Mrs. Pilkington went into Farmer Jones' room for the night. Another reason that I found the movie very different from the book would be that when they were supposed to sing "Beasts of England", (pg. 7), the animals sang "Beasts of the World". When Old Major died in the book, it seemed to have been that he died of natural causes, (pg. 9), whereas in the book, Old Major died by being shot. In the book, Mrs. Jones never went to visit her sister. When the rebellion happened, the animals had forced the people out on their feet, (pg. 12), while in the movie, the humans had left the farm in a car. It also wasn't just Farmer Jones that had left, there was Mr. Pilkington and a few others as well. As well as all the people leaving together in the car, I had never read that Mr. Jones ever had "gatherings" with other people. I also did not read about Mr. Jones and the others ever going to a pub and telling anyone what had happened with the Rebellion.
Now, later on in the book, I hadn't read that Pincher (a dog), had gone to a ceemony to be declared a "guard" of Napoleon. Also, after the people were kicked off the farm, the people placed michrophones and wires in the house/farm. I especially never remember Jessie's puppies being taken away from her and even when she tries to get them back, she is forced to go back and not to try and see them again. When Mr. Pilkington was trying to bring up trade with Napoleon, Mr. P never offered any of the pigs whisky. He would always just trade and leave the farm. Now, relating to the windmill, in the book, Mr. Jones did not blow up the windmill with dynamite( pg. 47). When Napoleon decided to slaughter the animals, he had done it through a movie in the movie while in the book, it was flat out explained that he did it in plain sight for all the animals( pg. 56, 57, 58). Once again, all the animals hear news through a movie. For example, when Squealer was talking to the animals about the horse slaughterer whereas in the book, it was told directly to the animals( pg. 82). As, you can see, the movie was created very diferently from the book. Even though you see many reasons stated here, there are many more explanations that could have been given if I didn't want to bore you.