Hi, I’m so sorry about your flock of 7. Last year I had a fox take out 12 in one night, mine got in under the wire on the roof. I was devastated, I know it was a fox as we don’t have wild dogs or American wildlife in Australia. I can recommend double wiring your coop as a few years ago I had another fox attack where it tore the wire on my coop. We use steel mesh and if you haven’t already I recommend placing a wire skirt on your coop or laying wire on the floor of the coop to prevent digging. I hope this helps