So our Spitzes are calm and happy now without the extra boy. They've blended in better with the 7 older hens as a result. Our 5 X 9 coop has roosts on 3 sides. No one was using the east roost ever, and the Spitzes discovered it and took it over, rather than roost on the baby roost under the poop shelf. But last night, our little Sebright hen, tiny little pistil that she is, decided she wanted that entire 5' east roost and rousted them all off! Not only that, but they weren't allowed around the corner on the roost perpendicular to it, a long stretch of it sitting unused. The Spitzes were back on the baby roost, and one just roosting on the floor this morning, since they are too big for that roost. I am so mad at the Sebright. She's so pleased with herself, the little boss hen.
She sounds exactly like my Sebright - appropriately named "Trouble."
We have 3 roosts inside the inner coop & a very long one inside the covered run (which the chickens also use as a coop). There's more than enough space for all, but many roosts go unused. The better place to sleep is not on the roosts but on the shelves! Each night I find 4-5 hens crammed together on one shelf & Trouble all by herself on the other. LOL