I have four 22-week old hens (Wyandotte, Orpington, Australorp, Barred Rock). In the spring, my feed store will be carrying chicks under 2 weeks old, generally they are RIR's. I would like to get one chick from that feed store and introduce it to my four hens, but I do not know how to go about that, as I have never done it. I know many problems can arise if introduced improperly. What is the proper way of doing this?