I just finished a new coop I built for my girls. When I first got my flock I inherited 8 hens from my neighbors when the moved along with the hens they gave me the run and coop they built. They had 8 hens in a 4x4 coop with no ventilation. I made as many modifications as I could get get through the winter and then I worked over the winter to build them a new 4x12 coop. Actually finally just got it out of the garage this past weekend and pre-assembled on the driveway. You can see what I did here: https://www.backyardchickens.com/th...oved-out-of-the-garage.1238555/#post-19875474