My coop right now is a playhouse coop (4 x 8). But I need to make a new coop. But wanted to raise a pure line, so the trio will be cooped up into the new coop, most of the time. (or I might free range the birds every other day) Should I go double 8 X 8. In the new one... bigger? or will 4 x 8 that I have now be alright.