Been working on the new hoop coop this week. Got to hurry - the chicks will be out of the brooder in another week. This is what it looks like so far. The hoops are cattle panels, covered in 1/2" hardware cloth. It's 8' wide by a little over 12' long. I used 3 cattle panels. It's tall enough for me to walk through the door frame comfortably. (I'm 5' 6".) And I should still be able to walk inside when there's 5 or 6 inches of deep litter in the thing. So far, so good...
