Hi there, About a month ago we had six chickens: two black australorps (one is the boss), a light sussex (second boss), two isa browns (brown battery hen breed in Oz) and an IB/LS cross. All similarish ages. They got on well for about a year then they started bullying one of the isa browns until half of her feathers were gone. I pulled her out and put her in her own pen until she was back to full health then I tried to reintroduce her, but they were so horribly vicious I removed her and gave her to a friend. Now, a month later, I noticed them out there today viciously attacking the australorp that is middle of the pecking order. They were out freeranging in our large backyard in the area that they dustbathe. When I ran over and shooed them off her she was in such a bad way I thought she had been either bitten by a snake or had her neck broken (she was upside down and when I gently went to move her she was jerking and kicking but couldn't even lift her head out of the dust). I went to get the axe to put her out of her misery but when I got back she was sitting up, so I put her in the stable until she recovers (or not) Now I have two issues. One, I'll have to reintroduce her when she's better but that went very badly with the last chicken. Also, our friend asked us to take their pet light sussex as they are moving and can't take her. We agreed. How can I try to integrate these two into the flock without hell breaking loose? Below is a pic of our chicken house. About five days a week they get out to freerange in our huge backyard for about five hours per day. My thoughts are that I let the australorp recover for a week until the new chicken arrives. Then I remove the two top bullies and isolate them in the stable and return the injured chicken and the new chicken to the chicken house. After a period of time I reintroduce the two bullies one at a time to the flock. Any other approach I can take? Is our run large enough for six chickens? They do pace the run if they don't get out every day. Thanks for reading if you've gotten this far.