I am finally (!) almost done building my coop on the 2nd floor of my barn. I will post photos some day soon. I cut two new windows into the southwest corner, on the 2nd floor. I have a chicken ladder (removable at night) to connect the 2nd floor window to a small platform that is about 5' high. It looks a little like a mini fire tower. The chickens can just barely fly up to the platform, and then they walk up the chicken ladder to the coop. I take the chicken ladder (1"x10" x 8 feet) down at night. This seems to be working pretty well! By mid-winter, I expect that the snowbank in my backyard will be about as high as the platform, so the chicken ladder will just rest on the snowbank. So here is my question -- the barn itself (15' x 30' barn) is predator proof inside. For the 2nd floor window, what do I need to worry about predators? The window is about 12-15' up. I currently have it screened off with the 2"x4" mesh fencing, to keep the chickens from flying out the window. There is a single pane glass window over the window opening in the winter. In the summer, I might want to leave the window open. Is the 2"x4" fencing OK for predators at this height, or can you think of anyone who could climb up the side of an old clapboard barn, such that I need to use hardware cloth? I am right in the "city" but Montpelier is a city that most places would call a small town. Thanks for any opinions!