Made from posts and 8' 2"x4"s. Covered with 1/2" 60"wide hardware cloth. Most all of my birds are around the same age. I'm going to try and run them all together and see how it goes. If I have problems I will seperate the bantams from the big guys See any issues? Anything I should consider doing???? By the way... none of this is DRAWN to SCALE... LOL I'm an artist... not a draftsman!