OK, so they seem to have passed an uneventful night all together. This morning when I went out to open the pop door, they were all still on the roost, the 2 older ones huddled together & the 2 new ones quite a distance away from the older ones but huddled close to each other. So when I opened the pop door, the older ones came out & the new ones stayed in. Went out an hour later & situation still the same, another hour later & the new girls were outside & the old ones in. One is scratching around on the floor & the other is on the nest. I suspect I'll only have 1 egg today. The 2 old ones do that a lot, one will be on the nest & the other is inside to lend support I guess...lol So I'll go out in another hour & see what is going on. I really don't think they have grown used to each other this quickly, I still expect feathers to fly...hopefully no blood though. I'm concerned about them being cooped up together for the next few days day & night but it's going to be way too cold to let them out, wind chills of -40 are being called for with actual temps -12.