I currently have a flock of 8 hens, and I am looking to get at least 8 more come next spring. Between now and then I would like to begin planning my next coop project. As of now I have an 8 foot long x 4 foot wide x 4 foot tall tractor coop I built, and from what I understand is good for 6-8 hens. I am looking to build a new coop, preferably a tractor type if possible, to accommodate 15-20 birds. Minimally, how large will it need to be? I am only beginning my planning now, and I am looking to hear all ideas and thoughts on this matter. The picture below is of my current coop. I am hoping I can come up with a larger and improved version to house 15-20 hens, if not more. Again, I am looking to hear all thoughts and ideas, however the main question remains: What size coop do I need to house 15-20 birds comfortably? Thanks!