maybe you can tell me what I can add to my girls ( giving a rooster away and we want a new girl) we have buffO and astrolorps. we have 6 but the rooster has to be re homed ( we can not have roosters and he has not crowded yet. we would like to replace the bird with a new girl, but how do I do it? do I have to build a new coop to keep the female in until they get along through a fence?? my girls are 18 weeks old right now.