Introducing new chickes to the older ones

[Medic328]

so, the house is finished. There will be an extension addwed on either side in the spring, for now it'll be ok. In the house I have wire separating the 5 EE and the orpingtons. Outside the runs are separated by fencing down the middle and each side is right now 15x9. I have left over fencing that I will add on in a few days to make it a little bigger. Under the house I have a wall up to again separate them.
So, I put the hens on their respective sides by putting them in the housing area for a few minute while I finished up some outside stuff. I opened the house, they came out did their chicken things and I left to go pick up my daughter. I came home, it was dark and I found 4 of my EE's in with my Orpingtons huddled against the fence. 3 Orps in the house, 1 under the house.
So now I'm in a panic, where did my 5th EE go? I gathered up the huddled EEs and had my daughter put them in the house. I grabbed the other orpington and put her in the house with the rest. Now the search was on. I checked around the yard for the missing EE, well when that failed I checked the Orpington side. Well there she was at the back of the house all huddled in the wood ships just as content as could be.
The orpingtons had not touched her nor did them seem terribly concerned that she was there and much smaller than them.
I'm not sure how long the hens were mingling with each other but I'm glad that none were harmed.
I'm gonna give them a week and then bring down a part of the outside separating fence and see how they do.

 

[Jealous Gypsy]

How many 6wo's?
How big is coop and run, in feet by feet?
Dimensions and pics would help here.

If you put them all into the new coop and run the same time,
it may reduce territoriality issues.
But still, have a Plan B ready and pay attention to the other aspects of...
Integration Basics:
It's all about territory and resources(space/food/water).
Existing birds will almost always attack new ones to defend their resources.
Understanding chicken behaviors is essential to integrating new birds into your flock.

Confine new birds within sight but physically segregated from older/existing birds for several weeks, so they can see and get used to each other but not physically interact.

In adjacent runs, spread scratch grains along the dividing mesh, best if mesh is just big enough for birds to stick their head thru, so they get used to eating together.

The more space, the better. Birds will peck to establish dominance, the pecked bird needs space to get away. As long as there's no copious blood drawn and/or new bird is not trapped/pinned down and beaten unmercilessly, let them work it out. Every time you interfere or remove new birds, they'll have to start the pecking order thing all over again.

Multiple feed/water stations. Dominance issues are most often carried out over sustenance, more stations lessens the frequency of that issue.

Places for the new birds to hide 'out of line of sight'(but not a dead end trap) and/or up and away from any bully birds. Roosts, pallets or boards leaned up against walls or up on concrete blocks, old chairs tables, branches, logs, stumps out in the run can really help. Lots of diversion and places to 'hide' instead of bare wide open run.

This was very helpful and answered alot of questions i had as well. Good post ty