Thank you everyone for your advice. She is actually our head hen, the ruler, the queen, makes sure everyone knows it. And yes the 6' x 6' is just the coop. They have a covered 6' x 20' outside run and a open 35' by 75' outdoor run, they also get to free range our property while being supervised (they don't seem to care that our nieghbors dog would eat them in a heart beat, silly chickens!) I don't feel that they are cramped in there coop, there are no squables and they all seem to know there place. I would definitely not introduce any new hens, I would prefer to replace the whole flock in a year or two instead of trying to bring in a new comer. I think we would definitely need more coop room if we were going to do that just so the new one had a chance to get away if need be. My ideal situation would be to set up another coop and run and have some more chicks in the spring and just rotate them out to new families so I always had a flock of 1-2 year olds and a flock of pullets (I hope that made sense).