I have two new chickens that i got Sunday. I keep them together inside the coop where my four old hen live. These two chickens are separated through a fence so that the old chickens can only look at them. During the day for a couple of hours i go outside and let the old and new chickens free range (I am there 100% of the time to make sure they don't kill the new chickens) One of the old chickens (she is the lowest of the pecking order in the original flock) runs after the two new ones and keeps pecking them. And when they run away she just continues to chase them. What do I do?????