This is my 1st year so I surely have a lot to learn but I think I'm off to a great start. I made a big mistake in only purchasing 9 pullets (RIR) ... but the number of pullets seems to be the only mistake as my 9 began laying at 20 weeks and just past that age I'm getting regular production of about 6 eggs/day. I've been excited at the response from my small customer base as we all know these fresh eggs are wonderful. So now I've ordered another 12 pullets (RIR). I'm thinking that by late next spring I'll be producing about 1 1/2 dozen eggs/day. That comes from an estimation of 21 hens producing at 80% daily. Here's the part I'm not sure about. My coop is 12x12 and my pen is 12x24. I've partitioned off an area about 5x5 inside the coop for the chicks. They will have access to the pen as will the older birds and I can block the holes to allow only the chicks or the older birds in the pen at the same time. BTW I have 4 nesting boxes. I plan to remove the partition and allow all the birds to integrate when the chicks are about 20 weeks old. I'm wondering what will happen when this integration occurs? Also I have one RIR rooster.