I have six chickens who seem to live together pretty happily (no feather picking, squabbling, etc). The coop has 8 feet of roost space (2 four-foot roosts). The last couple of months, I've had one, rarely two chickens (always one or every once in awhile both of my two Wyandottes) that sleep on the floor! Why would they do this? There's usually four chickens on the top roost (sometimes all five on one) and usually one chicken (not always the same chicken) on the second roost by herself. Doesn't seem to be any foot/leg issues going on and no overt bullies. The chicken the usually sleeps on the floor was halfheartedly broody off and on this summer (dealt with it by just physically moving her out of the nest box for a weeks weeks a couple of times a day and distracting with scratch). Could that be related? Attaching a picture to give an idea of the setup.