I currently have 6 full grown large breed chickens in a 4x6 coop. When they are all roosting there seems to be a lot of room, room to add more chickens. But when they're down pecking around it's pretty crowded. The nesting boxes are exterior so the only thing on the ground is the water but it's still quite busy in there. Currently I let the chickens free range because I didn't finish the run before the snow came last year. Now I'm realizing that the run design is way too small and I'm going to have to either redesign or continue to let them free range. I'd like to add maybe 3 or 4 more chickens. Do I have room?