Animal Farm Movie/Book Difference

The difference between the book and the movie is that the book had more details. While watching the movie, they don't narrate. Without the narration, I wasn't sure what they were trying to show at some scenes. In the movie they sang the national anthem for the Unite Kingdom, which you can't really do in a book. The movie also kinds of exaggerates the details. For example the fire when they were burning the books. In fact, in the movie, they didn't burn the books like the movie. In the book, it said that Napoleon tricked Roxy into being on his side, but they never showed that in the movie. Most of the main events were the same, but of course, the book was more detailed. There were some details that were altered in the movie, but it didn't stray far from the original idea of the book.