pardon the newbie(ness) of this question, but the more I read (pictures I see), I thought a run referred to a fenced off uncovered area. Which is what we have been planning. Now I'm wondering whether it really needs to be a roofed area? We live in Washington State (so I don't think I need to tell you about the scads of rain we get). Would the chickens do fine if the run area was not roofed over? The underside of the coop is accessible to them which is approximately 8' x 4'.