with my flock, i'm breeding for good temperament... so even bad tempered girls go bye bye. I don't need their eggs that badly.@TeaChick That is horrible. I have read peoples problems w/ integrations gone very bad here on BYC. I have intergrated several times and never experienced more then just a casual tift here and there. Are you wanting the bad natured hens eggs for eating or for setting?
fortunately even the squabbling roos get over it pretty quickly. my sfh and mille fleur cochins are side by side pens. for a while they just wanted to kick each others' butts. so I turned them both loose. 3 days later, I find all the sfh AND the cochins in the same house squashed onto the roosts, all together. including both roos with bloody combs, side by side. LOL that's 9 birds on 4' of roost space btw. LOL by CHOICE! I had to take the sfh girls out to make enough room, left Gunnarsson in with the cochins so they wouldn't forget they were buddies soon... (let the pens free range for a few more days before they got locked up again - I think some of that time was spent fraternizing with 'the enemy' for the girls... my mfc chicks that have hatched out, i'm pretty sure aren't purebred. LOL but with only 1 girl laying, it hasn't been a huge issue. LOL