Actually, I just call "Chick Chick Chick???!!!!" and usually they all come running as fast as they can. We do have names for our Roos and some of our Hens so they will come if you call their names sometimes (I know, I'm not kidding - I wish my dogs listened as well) sometimes just making a hen noise will also bring them along. You'll have to experiment with your group and see who actually likes what sounds or group of sounds.