I have 3 older hens and a really nice rooster. I needed a new flock and I have a beautiful group of 13 chickens (Brahma, americanas, gold sex link, silver wyandotte and buff orpingtons) I took all the advice on here and put them in the bottom of the coop in a makeshift area while they were babies and they could see the bigger chickens without getting hurt. I have now opened up the entire coop and things go pretty well with the older chickens just kind of taking pot shots at the younger ones when they are in the way (no bloodshed lol) HOWEVER... the new flock will NOT get into the coop at night. They roost out in the screened in area or on the ground! We did a chicken rodeo for 2 nights and put them in the upper coop but as soon as we stopped rounding them up and putting them in the top coop they just regressed to staying out side all night... The older chickens did peck at them in the indoor coop and would not let them up on the roosts but it was not that bad. It is almost like they can't figure out how to get up the ramp??? any advice is welcome! I need the younger girls to start figuring out how to sleep inside because it gets really cold here!