I have 2 GLW hens and 4 BO hens almost a year old and 1 one year old Buff Orpington rooster. I have 5 new Americana chicks that are 9 weeks old. They are all suppose to be pullets, but, lucky me, I get a rooster. Anyway, is it too soon to integrate them into the flock. Are they old enough. They are making a mess of the bathroom they are in.