I had some fencing leaning up against the run fence. I thought it would be fine till I got around to moving it out. Last night, closing the pop door I was one hen short, a nervous Buff Orpington, 4 months old. Looked around and found her stuck in the 2x2 opening. Exhausted and bloody. She had beaten herself to near death. Got her into the house with some warm water. No luck. She was scalped and skin was tore from her wings. Not sure if the other hens pecked at her. Doesn't matter. It was my fault. So, clean up when you're done. Not later. Sad night, buried her today.