We have our 10 girls in a large fully enclosed run with 1/4 inch hardware cloth all around and under the roof on top. We have a hawk in the field behind us that has shown up a few times since we got them this summer, and it is the last two encounters that have me worried. The first encounter, I looked out the window because I heard all of the chickens talking really loudly, and I thought one of them had gotten out and was walking around the outside of the run until I realized it was the hawk. Then today, I was looking out the window and it looked like the hawk made a crash landing against the run...like it didnt see the hardware cloth until it was too late. My poor chickies were so scared they wouldnt come out of the coop (which is fully enclosed in the run) for a good 45 minutes. My husband is convinced that we have fort knox built for a run, but I'm getting worried. The weather is getting colder, I'm sure food sources for predators is diminishing. I am shocked at how persistent the hawk is being and now I'm nervous it will break in.