Hi! I recently put my chickens outside. They have found their spots on the roost, and sleep the same every night. I have mave sure that they have plenty of roost space, but every night there is one Australorp and one Barred Rock squished together on one side of the roost, and one Australop, one Barred Rock, and two RIR's squished on the other side, leaving the middle completely empty. Any comments on why they are sleeping like this?