NEWBIE here. I live in NH, my wife and I are thinking of starting a flock. I've been doing my research (via web) but I've found a lot of conflicting info. We're thinking of about 5 chickens, how big should the run be? The coop (or soon to be coop) is an existing structure on the property. It measures 4 ft wide about 9 ft long and about 4.5 feet high. Does this sound sufficient for a coop? Also, I've read that NH Reds are a hearty breed, is this so? THANKS!!!!