I started off with six hens and one rooster, but unfortunately, two of the hens died. We got these chicks in stages: two Bantams in May, Two Polish in June, and three day-old Easter Egger chicks in July. The two hens that have died where part of the last trio. Now, the lone Easter Egger is getting bulled and picked on my the Polish hens - they won't let her out of the coop - if she manages to get out, they chase her back in. I am worried that she will get depressed without her friends in combination with the bullying. Any thoughts or advice?