I've had the wooden pop door found here http://www.automaticchickencoopdoor.com/ for 4 years now without issue when used properly. We live in a suburban house next to a park and have a dog. We had two coon attacks over the summer-- once when the door didn't go down at all, and once when the door went down before everyone was inside. (Mrs. Coon had FIVE babies last spring and I believe she was a little more motivated to brave the dog.) I fixed the door problem with an EXCELLENT Honeywell sunrise/sunset timer but my neighbor says a coon could get into my coop via the pop door. I know anything is possible but has anyone actually had that experience? Currently the door recesses into the lower track about a half inch, and I'm thinking of increasing that with an additional barrier, unless it's not worth the time and effort because the coon will just go through the door instead of just opening it. Thanks.