Our girls make the sweetest sounds! When everything is very quiet upstairs, we can hear them faintly as they chirp away in the basement. When we visit them, they sound like this:
Little Chickie Chatter
There is one little chick that we don't know by sight (except that she's one of the black ones), but we sure know when we've scooped her up! She has a very loud Peep! Peep! Peep! We call her Noisy.