I bought an Amish built coup that had nest boxes and a small roosting area for all my chickens for the winter, (it was easier to insulate and clean than my 2 larger houses and my birds don't need all the extra space during the cold winter nights) anyhow..... the roosting area is only about 10" of the floor but most of my jerseys prefer to huddle into the nest boxes at the end of the house or squeeze under the roosting area (they are still young, not yet a year old) with the exception of one of the roosters. while my red cross/production red/comet hens just about all roost. I'm not sure exactly what they are just guessing by hatchery website pics. i bought them from an Amish lady that a friend of mine works with, but they are egg laying machines and they are hilarious, so I love them.
they all seem very pleased where they sleep, if I go out late at night to check on them and disturb them from their spots they always go back to where they had been.
when summer time comes I will move my Amish hens back into one of the big houses, but I have to take roost out of the other before the JG can go in. I don't want any injuries.