Chicks will be 4 weeks old on Monday. They are outgrowing the brooding pen. I have stopped turning on the Eco-glow at night and the birds are all trying to roost on the highest broom stick in the roost. Will any of them roost on the stick that is 1" lower? No. They will cram on to the highest one, even though some won't fit. Anyway, days are warm (70's). nights are cool (50's) , and they are spending all day long out in the run. We want to put them in the coop early next week but I have no roosts built yet. Permanent roosts will be 2x4s turned flat-side-up at about 3 feet, but I don't think these little guys will like that. Any tips as to dimensions and heights of roosts for the next month or two?