Hello! So I am trying to figure out if I could add one more chicken into my coop without crowding the chickens. So our coop is 6' 1" long, and 4' 1" wide. And the henhouse is 3' 7" long and also 4' 1" wide. Does each chicken NEED 4 sqft in the henhouse? I know that people say like 10 sqft per bird in the run... But our hens have always been happy and healthy in what they have. We let them out almost every day if we are home, and they free range in our yard. But I was also thinking about adding a perminent fence going out from the run to add a bit more room that they could also have every day, all day. I hope this makes sense? Sorry its so long! Thanks guys!