Someone mentioned earlier in my post that having a secondary pen/coop would be a good idea, so I've been working out the details on that, trying to anyway because I have no idea how big it should be, I was thinking maybe big enough to fit 3-4 chickens, but I'm not sure if that's to big or to little, and trying to figure out if it should be close to the main coop/run or if it should be out of sight of the main coop? Also how long should I plan to use it if I have to pull the rooster from the hens, a day, week, month?