Ok I understand that the general rule is 4sq ft per chicken. So for my baby's I would need an 8 by 4. (I have six now but I'm hoping to add 2 more) Again I've read enough to know it pretty much has to be 4 sq ft so how are those pre fab coops that you can buy at TSP or on Amazon, how are those so small yet they say they can hold as many as they do. There was one at TSP that the coop was 3 by 4 and the run that was underneath it was the same 3ft but a little longer then the 4 ft. So not big at all. But it said that it could house 6 chicken???????