I am doing my research into keeping chickens before I get started, but I have a few things I just can't wrap my mind around in terms of the coops. Any help would be greatly appreciated. 1. Chicken Tractor? How often do you move it and isn't it heavy? 2. Pop door, do you leave it open all the time, or open and close it each day? 3. If you want to let your hens raise chicks, how you plan for the space in your coop when you never know how many chicks you will have? 4. Food and water, in the coop, in the run, or both? Thanks for the help!