Up until now our chicks: 2 red star pullets (6 wks old), 2 buff orp mixes (not sure of sex, 5 wks old) and one undecided (either a red star roo or an amberlink pullet, 6wks) had just peeped. They seem to have a content peep, a "Hey I found something cool!" peep, a roost-time peep, and a nervous peep. Today I have started to notice a slight squ-awk from one or two of my chicks. At first I thought dang it, my possible roo is a roo and then I realized it wasn't that one. I think it is coming from one of the buff orp mixes but my daughter says she thinks it is coming from one of the red star pullets. Do hens squ-awk sometimes? As you can tell I have never really been around chickens until now so I am very new to this. We bought our chicks when they were 4 weeks old.