I have 4 hens all slightly less than 2.5 years old. They have had the same coop and run their whole lives. They free range on our property during the day and return to their coop on their own at dusk. We shut the door to their run during the last trip outside to take the dogs out. Tonight I went out at pretty much dusk and all 4 birds were "roosting" on our deck table. We tried to shoo them and they scattered a bit, one somehow managed to get all the way up onto tall roof ridge of coop...I went back inside and then checked on them about 20 mins (and a lot darker) later and one hen was on deck table again, other 3 were on picnic table on patio...they very obviously did not want to go in coop or run. We cant find anything obvious in coop or run. For their safety we carried each one into the coop and shut them in. This is for sure the first time I have witnessed this. Any ideas about what's going on and how to resolve it? thanks!