All beautiful EE pullets! I agree that the white one is likely your layer b/c she has the reddest comb. The black one is probably the alpha, and they tend to make a lot of noise keeping the group together in my experience. Some are just noisier by nature. My spring EE's started laying a couple months ago. I have a sultan and a Pyncheon that just started last week, and they have both been very noisy and talkative for quite a while. Some chickens just like to chat a lot. lol. You might get green eggs from one of the other 2!