Also consider to do a little trapping, especially that targetting raccoons and opossums. Dogs can also be an additional worry, and they are expensive. Mine are driving me nuts right now. They are going hard after something to the south while an owl is messing around in the barn.
@tfatc, can you mow around the perimeter of your run and coop so you have what is essentially a strip of grass around chicken containment area? If so that can make easier to setup a hotwire physically attached to the fencing of the run perimeter. Hot-wire properly setup can do a lot to keep...