There's a scene in which the main character watches a boxing match on TV, which depicts a man getting his head graphically and bloodily split open. This scene is then replayed several times.
References are made to death and murder, including people getting run over by trains (non-graphic), and getting objects thrown at them, or bludgeoned (again, non-graphic).
A mentally and physically disabled child is said to have been suffocated by another person.
Three animated horse carcasses are shown
All violence is animated and although some of it is graphic, it isn't visually detailed.