These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
The Cat acts like she supports Napoleon, but tends to absent herself from the farm for long periods, and appears to suffer far less than the other animals. Moses the Raven is similar.
Considering Old Major's a boar, and pigs are pretty much VERYAlways Chaotic Evil in the story, was he an exceptional revolutionary as everyone thought, or was this whole thing a ruse with pig domination being the true goal?
When your whole worth lies in being slaughtered you will have definite issues.
Animation Age Ghetto: Narrowly averted, as the film contains the same political allegories and violence present in the novel, and was marketed as an adult film when it was first released. Unfortunately, the BBFC reclassified the original rating of X (18 and over) to Universal, meaning that they consider it to be suitable for children.
Broken Aesop: The ending to the live action film. It suggests that all the animals need is the right master, and everything will be happy... never mind that the animals will continue being killed for food, having to work for a pittance etc.
Esoteric Happy Ending: The live-action film, made in 1999, tried to update the ending to reflect the fall of the USSR by showing a new family buying the farm and the animals vowing to do things right this time. Given the actual history of the post-Communist Russia, especially under Putin's reign, it's hard to look at this ending as anything but out of touch.
Memetic Mutation: "All animals are equal, but some animals are more equal than others" and "Four legs good, two legs bad."
Misaimed Fandom: As with 1984, the book is often a favorite of conservatives, who see it as purely an attack on the evils of socialism. Orwell himself was a Democratic Socialist whose aim was to rescue socialism from Soviet totalitarianism, and the portrayal of the human farmers makes his view of conservatism clear.
Specifically, the point of the ending is that capitalism and Stalinism are, in Orwell's eyes, equally evil systems that oppress the lower class for the benefit of the upper one. ("The creatures outside looked from pig to man, and from man to pig, and from pig to man again; but already it was impossible to say which was which.") And earlier on, the happiest period on the farm is the brief span between the ousting of Jones and the pigs' takeover. Orwell wasn't exactly subtle.
Benjamin seems to agree with this, as until that point he had been apathetic towards the whole revolution thing.
In the animated movie, even a raven bystander who had watched Snowball's death with stoicism is horrified when Napoleon decides to execute animals via mauling.
Interestingly, Orwell himself stated that the turning point in the revolution comes much earlier, when the pigs take the lion's share of the milk and apples for themselves instead of sharing them equally with the other animals. That's the first time they put their own greed above their cause or their comrades, and from there on it's just a decline into more of the same, but worse.
Obvious Judas: In the animated film, the design of Napoleon makes it far too evident that he is or will become the bad guy, especially if you compare him with the other pigs.
What an Idiot: Jones, in the animated film. While the animals fought against the invading farmers, Jones sneaked into the windmill, filled it with explosives, set them on fire... and, instead of running away, he took a bottle of wine. The windmill exploded, and we never heard about Jones again.