Hey Yall, My bf and I started a new project: build a chicken tractor and get some chickens. Now thats all I want to think about! Which is bad because Im supposed to be studying for finals not obsessing over new pets. The problem we are having is that it has been a while since either of us has seen a chicken so we cant remember how big they are. So far we have built the frame of an Ark style chicken tractor and its 5' X 10' at the base and 4' tall. We have divided the inside into two floors...the bottom will be a small run and the top will be were their nest boxes and roosts will go. Right now the second story is 20" tall from the floor to the apex and Im worried that might not be enough head space. What do you guys think?