When I was a kid, not once, but twice, two different individuals shot our family dog, 'just for the heck of it'.
The one that shot our first dog is dead. He lived a miserable life, fathered a number of children with different women and died poor and alone.
The other one didn't apologize until my sister went to his house and said, "Well you killed my dog, I've got my gun in the car and I'm going to shoot your horse right between the eyes."
In that instant, Lesson learned.