I have a coop which is a small log building with 140 square feet of floor space. Attached via a permanently open door is an outdoor run with approximately 350 square feet. The run is wire enclosed and safe from predators so I leave the door from the coop to the run open all the time. I also let the chickens free range on most days (but not every single day). My original calculation was that I could have 35 standard laying hens because that's 4 square feet per chicken in the coop and 10 square feet in the outdoor run. But because I have the run and the coop attached, can I have more than that? In other words, does the four square feet per bird rule of thumb hold true when the birds also have access to an outdoor run? Thanks in advance for your input.