Here's a funny story for y'all. Yesterday afternoon I caught the GSD stealing eggs from nest boxes and decided to close in the front of the coop. I covered the whole front with plastic roofing and left a chicken sized opening in one corner, way too small for a German Shepherd. Come sundown, four of the five hens got in no problem (after a certain amount of milling around and discussing the change) but Nugget the Australorp was having none of it and decided to go roost in the feed station, 30 feet away.
After a few minutes, Big Red the RIR reemerged from the coop, called a few times, then went over to the feed station, got up on the platform next to Nugget and started trying to talk her into joining the rest of the flock. Nugget just ignored her and it was getting dark so we decided it would be best to help Big Red out and carry Nugget back to the coop, which my DP did.
We then expected Red would follow but at that point I think she was too confused by the turn of events and just stood there in the feeding station, looking confused, so I went to her, petted her and told her she was good and backed away... And she followed me back to the coop like a puppy and got in. I think that may be one hen who gets to die of old age.