Mistake #1. Do not feed the wild animals because you think they are cute. This guy was a douche and deserves what he gets, but part of the blame for their deaths falls on the feeders. Ducks can major poop, I had neighbors with dozens upon dozens of wild Mallard ducks that became rather domestic and you could not walk outside, including my porch without stepping in it. My house was over 100 yards away from his. They finally got tired of all the poop and gave them away. Several found their way back a couple of times, although eventually they disappeared. Thank goodness.