I have a coop with 9 standard hens (soon to be less). It is aproximately 6`x 8`x 80 inches high. I would like to get a few bantams for showing. Is it possible to get a few bantams that live above these hens in a seperate floored coop of about 3`x 8`(around half the sqft). That would mean the bottom would be at floor height and the top would start at about 48 inches and go to the ceiling. How much room do bantams take?