I have 6 Buff Orpingtons that have been outside since they where 5 weeks old. They are now 10-11 weeks old. My roosts poles in the coop are like 20-24 inches high but isnt a ladder type. Its 2, 2x3 studs going straight across. They can get up to it and on it but wont roost on it at night. What should I do? They just sleep on the floor in the straw. Should I put a ladder style that they can kinda climb up on or will they get it on there own. Also what age do orpingtons usually start laying?