We have....in our main flock A one year old Barred Rock which is the lead chicken. A one year old RIR A 5 mnth Amber Sex Link A 5 mnth Australorp A 5 mnth Black Sex Link and a 5 mnth White Leghorn and the new birds are around 3 mnths and are a Polish Hen and a Lavender Ameracauna. We have the our flock set up in and 8x8 coop with an 8x8 run. My boyfriend and I started out by raising a RIR and a Barred Rock in our home. Once they were close to a year we put them outside in a coop. That same day we went and bought four chicks and two ducks. We waited until the chicks were about 4 months to integrate them and we did it at night. The mixing went fairly well and there was only a tiny bit of normal pecking. The ducks did the best but since they were both male we decided to let them go into a pond nearby. We then bought two more chickens to mix with the group since we had taken two away. We got a Ameracauna and a Polish Hen. We kept these two chickens separated in a cage next to the six big chickens for about a week. Our old flock showed some interest in the the new chickens but when we put them together it was nothing but fights. Even our calmest and nicest chicken was fighting the new chickens. Our lead hen shows very little interest in the new chickens but everyone else will not leave them alone. When we put them together we cannot go a minute without a brutal fight. We are going to trim the Polish Hen's feathers so that she can see because as of now she just hides in the corner hoping to not be noticed. We have them separated once again until we can figure out how to mix them without the fighting. The old birds will grab the new birds by their neck and try and kick them. This doesn't sound like normal pecking order fights. Could it be that our old birds just absolutely hate our new birds? Or could it be because we have six against two? Is their anything we can do to make this better for the new chickens?