Really working hard on my coopaloop ideas and I am stuck with the run. I like the A frames, I like the kennels, I like almost everything....my question is, (and please no square feet, I am no good at that math, lol) is, how big does a humane run need to be for a flock or twelve to sixteen chickens? I figure by the time my chicken math is done in the room I have at this kind of house, I will end up with that many laying hens once the Roos have been found and rehomed and replacements brought in. So, for a humane open space run/pen, how big should it be? HxWxL? Thank you so much in advance!! Pics welcomed!!!