I have my carpenter Carl building 2 breeding pens for my bantam flock they are sooo coool.I am really happy with all the updates he has made for me this past summer will post pix when finished.I will have 2 pens inside my bantam/chick/broody coop they are along the south wall 3ft wide by 4ft long and 4ft hi.There is a roost about 2ft high along one wall,and 2 nest boxes built along the walls,the front doors are hard wire small mesh those are 4ft doors for me to get in and out,then a door that can be opened in the middle so if I want too open it and allow both sides for 1 pen,soo cool