I had to give my entire flock away because of knee problems, but now after surgery ready to get started again. I need to raise 150 cornish rock cross broiler chicks until they are feathered out (about 4 weeks) and then they go to my in-laws to finish out and then process. I want to start a new laying flock for myself. Can I order my egg layer chicks at the same time and keep them together for 4 weeks?