I have 17 pullets total. 3 bantam millie fleur cochins who are about 20 weeks, 2 BLRW's who are living in my garage because of growth problems, and 12 other chickens who range from8-12 weeks. The 15 chickens live in a 10x10 coop with 4 nesting boxes and a 10ft 2x4 roosting pole. The 3 bannys sleep on top of one of the nest boxes and the other 12 cram into 1 nest box together. I have scooted them out at night, put a basket ball in the nest box, and even gone out late at night and moved everyone to the roost pole. Problem is...no sooner do I get one onto the roost they jump right back off and run to the nest box. Sometimes they all "pig pile" on top of each other in a corner. I am worried some of the littler ones will get hurt by the bigger ones. How long is it going to take to teach these girls to sleep on the roost and not the box? What else can I do to stop this behavior?