In general most peeps on BYC use a 4 sqft per chicken rule of thumb to determine how many chickens will fit in a chicken coop. I know there is some slack in this "rule" if they are only in the coop at night and have an extra large run space. So say you made a 4 ft by 4 ft coop and put it up for sale and stated it would house 4 standard size chickens. While other places have similar 4 ft by 4 ft coops up for sale and they state the coop will house 8 to 12 chickens. Now you could say your coop would house 8 to 12 chickens but you know the chickens would be overcrowded. If you don't peeps would think a 4 ft by 4 ft coop that will house 8 to 12 chickens is a better deal then the coop that is 4 ft by 4 ft and will only house 4 chickens. Wondering what everyone's thoughts on this are, except Buster he should be out building his coop.