The mom tries to kill the dog to provide meat for the family, but she hesitates before her son intervenes. The dog runs away. At the end of the movie, the dog is seen running away a helicopter that's carrying the two boys.
A character is taunted repeatedly that she will be forced to eat her children. In one scene there are squelching sounds, the shot is from behind, she appears to be eating presumably her children. Nothing is explicitly shown.