The last few scenes have a character make a literal deal with the devil after a long period of hardship. Given that we see the witch do things like eating babies, implied sexual assault, and psychologically tormenting people...
in addition to the dog that has been mentioned above, there are dead animals during a hunting scene and dead goats seen around 1:15 or so. Graphic scene.
It's heavily implied that a preteen boy was molested by a witch. At the very least, she kissed him, but the framing makes it clear that she attacked him in a sexual way offscreen. A mother falsely accuses her daughter of seducing her family. The protagonist is also asked to undress in front of an older man late into the movie, with her showing clear discomfort.