I brought home 4 pullets this past weekend (9 weeks old). The first night they all headed into the coop without issue but they insisted on roosting in the doorway and on the ramp. A little encouragement got them in the coop and 3 out of 4 made it on the 7 feet of available roost bar. However, one refused to hop up on the roost bar and instead spent the night bedded down in the pine shavings. The second night only one (the RIR that seems to be the dominant hen) used the roost bar. The other three (two Speckled Sussex and one Salmon Favoralle) nestled together in a corner of the coop in the shavings. Temps are in the mid-40s at night. My main question is how much I should worry about 9 week old hens not using a roost bar?