In favor of the farmers
I am a fairly compassionate person, but I have absolutely no sympathy for the pigs that died in this movie. Where do all these bleeding hearts come from? My favorite part in the film was when they panned across the audience in the courtroom during one of the "torture scenes" and they all had a look of complete apathy. You were expecting tears or some kind of painful/heartfelt reaction, but really, nobody cared. They all had stoned-face looks as though nothing of significance happened.
...Which is exactly the point!
I think the purpose of the film was to try and get you to feel sympathy towards these animals, and while I can empathize with their plight, I have no ill-will towards the farmers or their treatment of these animals. On farms, animals die. Sometimes, they will hang to death and struggle, and feel terrible about dying, and that is unfortunate but it's a way of life. Maybe when pigs take over the world they can do the same to us.