New Girls.... How long for integration?

I have 5 pure breeds and a Welsummer Cockerel all about 11/12 mths old now.  I bought 2 more yesterday (yes I know!!!!)  A Copper Black Marans and a Welsummer both about 20 weeks old.  They all have a small field to range in and last night I made sure the new girls were in the coop but today there is definately 2 Groups. The 'oldies' and the 'newies'  Its actually quite interesting to watch as Bernard, who was bottom of the PO before, is now tentatively 'bossing' the 2 new ones.  They are not being attacked or pecked  but they prefer at the moment to be omn their own.  How long does it normally take for them to be accepted??? Cheers Paul

I introduced two ex bats to my five POL girls last Saturday. First couple days there was a wee bit of pecking and squabbling (nothing major) and def two "clans". But after a few days (around Wed) they had all got to know each other and have been fine.

They have been Ok today albeit in two groups but Ive just been down to the field to put them in the electric fenced off area for the night & the others were really chasing them & the cockerel was trying to tread them.  I decided to take them out and let them free range.  Last night I put the 'old' girls away first, then went down after the automatic door on the coop had closed to see what was going on. The oldies were locked in the coop and the 2 new ones were perched in the shelter I built behind the shed.  Should I leave them there overnight  or put them in the coop with the others again till morning when the door opens at 6 and I open the fencing at 6.30???  Thanks again for advice