My new coop was just delivered. It's a 6x8 with 5 nesting boxes on one side. I currently have 6 - 5 week old chicks and plan to expand to 12 over the next few years. I would love some advice on the best things to do to make sure that my coop setup inside will be sufficient and good for a growing flock. I would like to build a roost board with a poop box underneath. I was thinking of putting that along the back wall which is 6'. Will that be enough room for 12 birds in the future?