Are they quiet or not? I have seen many people say they are among the louder ones, and that BO's are very quiet. I live in the city, but I'd really like so nice green or blue eggs. And, I'm not really supposed to be having chickens. Any experience with their noise level would be welcome. Also, I'll be getting them from the feed store. Can I observe them to see which would be quiet when the grow up, just looking at them for a while first? Or is that not really a good way to tell, like maybe a quiet chick grows up to be very loud? Thanks for any input.