Last Summer I added 2 hens (Delaware and Russian Orloff) to my existing flock of 2 hens (an Ameraucana and a Silver Laced Wyandotte). When I initially added them to the run the two older hens took turns jumping on the Delaware's back and pecking at her face. I separated them after 10 min. SOoooo... I started to let them all free range in backyard, to get them acquainted, and for the last 6 months, they've been fine out in the yard, scratching for bugs side by side,,, but as soon as I confine them to the run (it's about 80sq ft) the older chickens immediately attack the Delaware (also the orloff, but she's very timid and hides from them and doesn't get it as bad). They all roost together in the coop at night, but once confined within the run they go nuts! I need to get these girls back in the run,,, and not pooping all over my porch! I wonder if in the past I have interfered too early, before they were able to establish their rules? The Delaware is now the largest girl, healthy and outgoing, but I'm afraid to leave her with the old gals who immediately go for her face (maybe because of her red comb??) The run seems to be big enough, shady enough, plenty of food, water, etc, and I confined the original hens there without problem for a year. Any suggestions would be very much appreciated!!!