dreamofwinter
Songster
I'm late to the thread, but wanted to add my experience in case it's any help. I have a large OverEZ coop too, and I arranged my roosting bars very much like you did. I had 10 large fowl (including Brahma) chickens in there all (Maine) winter long, though they did have access to a covered 8x16 run every single day. There were no issues with roosting space - they just cuddled in, all on the top bar!This coop says it’s for 15 birds which now that I assembled it I don’t believe it. Unless it’s the dead of winter my birds are going to be outside anyway so hopefully the 12 on their way will be fine. I am concerned about the roosting bars though and even with some adjustments I can only get 8 inches between the bars and also just 8 inches from the back wall.
I did modify the coop to add vents for airflow along the front above the windows and on the sides, plus a line of small holes at the very top of the back wall. Despite our -15 F temperatures I had no frostbite issues.
On the floor I used pine shavings in a deep bedding system. I would pick out the big clumps of poo with a pitchfork every few weeks (more often once the ducks decided they would also sleep in the coop instead of in their nice duck house). I probably added three or four bags of shavings over the course of six months.
Overall I was really happy with our OverEZ, but have recently upgraded to a full on chicken barn (custom 10x14 shed) because I've admitted to myself that I have a chicken and duck math problem. Now that I'm up to 12 chickens and 6 ducks the OverEZ was a little tight! We're still keeping it around in case I ever want to separate a breeding flock, or need quarantine space, or go off in a bantam direction, or whatever....