So, chicken math is upon us again, along with a gifted incubator, and this year we would like to set up individual pens to house and breed our chickens in. Most of our breeds we have 5-7 hens and 1 rooster, so we are looking at somewhat larger pens. What size would you guys start out with? I know the rule of thumb is 3+10 sqft per bird for the coop/run but we would be building these runs as a coop, and a 78-104 sqft pen seems excessively big to me (8x10-10x10) considering we are housing all 27 of our adults in a 20x20ft pen currently with 8 ducks and everyone is doing well. I'm also looking for pictures of pens that people have 6-8 large fowl birds in at a time to get a better idea of how to make them economically. We don't want to put too much into infrastructure this year or next as we may have to sell our house in 2017, but we do want to make it easier for the chooks to pay for some of their food bill through hatching eggs and chicks.