So I have a little flock of 8 birds at the moment, all of which are 10 weeks to 18 weeks. They have all gotten along just fine with absolutely no problems what so ever. Until now. A friend of mine had gotten three Buff orphington hens and raised them up only to find that there dog wanted to eat them and well...that there town was not chicken friendly. These birds are already laying eggs, and there daughters were terrified that someone was going to get them and eat them, so in a nut shell they got me to take them with the agreement that i would not eat them as a favor. Well i put them in a large open wire crate for three weeks and let them get used to my birds, all was fine. I let them out to free range after the three weeks, everything was still fine. No one seemed to care about anyone as usual. So I let them stay out for the night to see how everything went. Well...the very next day was not so great...The morning went fine, I opened the hatch and they all came out and free ranged as usual... Well that night when I went to put the birds in the coop, all eight of my chickens dove for a nesting box and hide there cramped and crumpled all on top of one another. The younger ones were screaming like someone was killing them, and the older ones were sitting on top of the other birds with there wings out like they were protecting them. Well, I decided to sit in the coop and wait and see what happened next and sure enough all three buffs came in and begin pecking at, chasing, and just plain tormenting my birds! Against my better judgment I decided to listen to my fiancee let them have at it since they were not doing any harm but tormenting them, and we thought it was just a pecking order thing. The next day they were all still lodged in the same nesting box, a few feathers scattered, but nothing alarming. I opened the hatch and the three girls came out, but my others would not move. I had to go in and manually remove them from the nesting box, only to then have them ATTACK the food and water. I let them free range, again with no problems, and tonight I went to do the same thing, i put all of my birds in for the night and then put the big girls in...same thing happened. I have no where else to put these other birds at night, literally no where. The crate is out of the question as it was hard enough convincing them to go into it, let alone move in it...It would not be fair. At the moment I am having them stay outside the coop until I get some advice! What should I do!!?? I dont want anyone to die, i dont want anyone to be hurt, but these birds are going to end up hurting one of my baby's! What should I do, what went wrong, and why are they suddenly doing this when they were fine???