I have always wanted to build and have a chicken coop. No more than 10 hens and one rooster. What is the real answer on buying a prefab shed and modulating it to make it into a chicken coop. I would have a nice fenced run, vents, and window and door and outside access to the nesting boxes. I live in a cold part of the country, not any colder than any North part of America, but in Montana here, would I have to Insulate it? thanks all