It’s been roughly 2 years since we embarked on backyard chickens. I would consider our coop very secure and you can learn more about the coop here: https://jamz.net/chicken-coop-automation-walk/
However, in the past 6 months I’ve lost 4 chickens to fox, in the middle of the day. It seems, they find a weak point in the netting in the large outdoor area, climb the fence, go in the netting, and grab the chicken. It would be very difficult to keep the netting secure, as sticks fall on it, etc. So, I’ve devised a plan.
Now, we have the coop and very secure area under the coop and small enclosed area. The automatic door opens to section 2, the open run secure area. I’ve put a metal wire, over the netting, to extend about 10 feet out from the wooden coop. At that point, I put a fence, in the coop, to block them from going to the larger outdoor run area, with the netting. I will only permit them to go in this area manually, with me opening a door I will build. Watch the video to learn more.