Oh, I just saw another post about about my pen design. The whole thing is a pen, 100 square feet total with 13 two month old chicks. A lady added 3 chicks to my order but she hasn't taken them yet as she has to do repairs to her coop. So, I will only have 10 birds once she gets hers. (She may even take 4.) I tried to stick with the 10 square feet per bird rule of thumb. I just don't have a traditional closed up coop with attached run. I just have the "run" with roosts and nest box and feeders in the run. The whole thing is covered on top with more hardware cloth and tarps over that. I did add 3 plywood sides around the roost area to protect from drafts. I have all cold hardy birds. I read a lot about how chickens can take lots of cold, but they need tons of ventilation and as long as they have protection from drafts, they are healthier. I let them out sometimes, too to free range. I never did see any of them pecking at the toe wounds or even pecking each other at all. They seem to be happy and are always making those cooing sounds. My pen is a L shape with different areas for roosts and ladder, nestbox, feeders, and also has straw, sand and dirt in different areas to dig and scratch in. I hope they're not bored. They do definitely like to go outside, but I tried to make their pen big enough that they have enough space if they can't go out.