Both our main characters are verbally abusive to one another and the man slaps the woman during an argument, and manhandles her a few times. It's a horrible, abusive relationship throughout.
The scene should absolutely be skipped if you have trouble with animal violence. The pig is screaming in a burlap sack, before a boy hits it with a hammer to silence it. Then, they open the bag, and the pig is shown, barely breathing. The kids proceed to stab it in the neck, causing more screams and a shaking body before it dies.