We had to shoot two possums this summer. They were climbing trees around the electric fenced enclosure and dropping in. First they ate just the spilled food, then went on to eat the polish that were not getting into the coop before the automatic door closed. We also lost 8 chickens and 3 ducks to a fox feeding her pups - these were the birds that were flying over the fence to forage. It's distressing and disheartening for sure. You have everyone's sympathies, as most of us have been there.