I think 684 sq ft is still free-range for 6 chickens and is plenty. They used to have 1/4 acre but they were into everything. I am much happier; no poop on the deck, no chickens eating my wheat-grass unless I give it to them, no one digs up my potted plants, no extra fence around the garden beds, etc. So ~ they are still free-range, right? Their coop is 4' X 8' screened with a night time lock down area that is 4' X 4' with a 4' roost. They have access to the screened area except at night. Their new fenced area is 38' X 18'. They get up at 6:30a in the summer and go to bed about 8:30p