Mentions of a dead bird (cooked alive in oven) and dead hamster (skinned alive), but we don't see it happen. Later in the movie, we see dead fish washed up on shore, dead under mysterious circumstances.
A kid is shown tied up with her mouth sewn shut, but we don't see the sewing happen. Another kid is tied up with ductape over his mouth at one point, but we don't see what happens.