Thanks for the reply guys.
Yes did the seperation by cage thing for just over 2 weeks. Then introduced them and my 2 RIRs were the bullies so i removed and rehomed them. It has now been almost 2 weeks i think and there isnt really any fighting the 2 groups just stay away from each other. Occassionally when i feed them scraps the newbies wander slightly closer so one of the oldies will chase them off and give one peck but thats all. Theres no fighting since i removed those roosters they just wont merge at all! :-(
Started off with 6, the new lot is 3 hens. Of course then got rid of 2 so its now 4 and 3. The current agesare about 6 months originals and 3-4 months newbies. My chooks are freerangers if that makes any difference. Have wondered about not letting them out til later and forcing them to socialise but i think that would do more harm than good.
The younger ones stay close to the shed and only range about 5-10 metres sq and the older ones roam about 2-3 acres.
I did the integration thing at night, put the newbies outside the roost and let them get sorted...the newbies stayed apart till they got to figure that the oldies slept warm and comfy in the roost house.... They moved in on an unused roost as a threesome. Now few weeks later still perch in groups, mums, offspring, newbies but feed and forage as a flock.......it's taken WEEKS!!!