My 2 nine month old RIR hens have been chasing and pecking the 3 nine week old babies I just introduced. I let them get to know each other for a few weeks in the pen with the babies separated through some chicken wire. I have finally let them live together and for the past couple days the older ones are pretty mean to babies. How long will this last? The older ones were just roosting and one of the babies flew up on roost and was chased away. Are they ever gonna coexist happily together. One of the babies has turned out to be a rooster to our surprise...was told they were all hens. How will this affect things? Any advice will be greatly appreciated.