Thank all of you for your responses! I do have a new bunch of chicks and I'll certainly get to work fortifying the pen. I never gave raccoons enough credit, I guess.
I live in Western New York and have a mystery predator. I had a flock of 21 egg layers earlier this summer that were kept in a coop open to a fenced-in run. I used 2 x 4 welded wire fencing, 6 feet high,
1 1/2 inch poultry netting over the top, and wire fencing buried underneath to prevent...