About 3 months ago I had three chickens...A barred rock and 2 easter eggers. They all got along great. A neighbor dog got loose and killed the barred rock, the matriarch. Since then the other two rarely leave the nesting area of their coop. They have an attached run which is closed unless I let them out to roam the part of our backyard that has a 48" moveable fence attached to the entrance/exit from the run. We think maybe they are still fearful and unsure since the barred rock Phaedra was the boss and they did whatever she suggested. I have tried to lure them out with treats which sometimes works. The weather is getting colder and they are just getting more reluctant to leave the nest area. Any ideas? Thank you in advance.