Right now I have 24 chickens, and around half of them refuse to stay on the roost! All but 4 are over a year in age, but the younger girls are actually very obedient and sleepwhere they're supposed to I think it's because they are wimps and would rather sleep on the significantly lower platform than deal with the "meanies." Some of them, I can understand, but the older, more dominant whites?!?! Me and Mom are done letting them geta away with it. Any advice?