Every time. Every stinking time I introduce new, big and imposing hens into my coop they get dominated and cowed by my game hen. Every stinking time. And when I say dominated, I mean that my mean girl literally chases them around and around, coop to run to coop to run, off perches, out of nesting boxes, away from food and water, she keeps them on the run until they finally give up and leap to the top of the nesting box and quiver there for about 23/24 hours of the day. Every day. The only reprieve they get is when the mean girl goes to lay, which takes her anywhere from 1 or so hours. I just introduced two new Delaware girls who dwarf the mean hen by about two times each...these are some huge ladies! But now I have a new wrinkle to add. My new delawares are so shaken and scared they are now taking to hiding, together mind you, in the only nesting box the other girls will use. That means they are using it as a port a john and keeping it occupied while the other hens just pace outside clucking. I have had it!! I have run these bigger and supposed to be tougher girls out of the box all stinking day!!!!! I am so DISGUSTED. Had to vent. Also, if you have advice, I would appreciate it, but just to let everyone know, getting rid of the mean girl is out of the question. She is my husband's "baby". Also, isolating her does NOT work. She comes back be it in a day or two weeks with an even worse attitude. And she is not even the top hen!