I introduced my 7 chickens to their coop about 6 weeks ago. They seem really happy and well adjusted. Two weeks after I allowed them to "free range" within a larger enclosure that doesn't have a roof. At twilight when I go to put them back in their coop I find them in tree limbs that hang above the run. The last week I have cooped them up earlier, but when I come to let them out in the morning have discovered that they are all huddled together on the ground. They are not using the roosting dowels I have set up in the hen house. So my question is: Any good ideas on getting them to go back to the hen house when they are ready to roost for the night? My last groups of chickens all were fine with roosting the the coop.