Okay...so now for the update after adding the two hens. Overall it seems to have went well. I eneded up giving the existing girlls some treats just before i went to get the new birds to ensure they were fed and in a good mood. They were all roosting when I got back to add the new hens. I let the new birds in and they all came down to say hello. The Ameraucana seemed to be the some aggressive, doing to pecking and chasing, but didn't last very long. At the end of it all they ended up all roosting together. Hopefully they will all LAY happily ever after!!!