You just confirmed something I've found interesting ....
I have only 4BOs (19wks), they have 4 roost in their Chicken House. Right now they choose to roost on the lower front one and all squished to the right (closer to the door) and they roost in a certain order
The last set of 4BOs I had started roosting on the same but when they started laying, roosted above the nest (large plastic dog house) that has a poop board under it
. There was just enough room for all of them but they were in a certain order, I banded them with colored wire ties. Prior to them I was given 5 Blue Wyandottes (6mo) they roosted above the nest, again just enough room but in a certain order.
BTW - I read 2x4 flat side up so that's what my roosts .... Waiting for your results.
I have only 4BOs (19wks), they have 4 roost in their Chicken House. Right now they choose to roost on the lower front one and all squished to the right (closer to the door) and they roost in a certain order

The last set of 4BOs I had started roosting on the same but when they started laying, roosted above the nest (large plastic dog house) that has a poop board under it

BTW - I read 2x4 flat side up so that's what my roosts .... Waiting for your results.