Hi there, we have 11 new ladies (hopefully), from 1.5- 2 months old. For the last week, one "lady" has been letting out a squeal, (or loud chirp) oh, about every 20-30 seconds, including through the night. No clue what that means, but it is acting normal, eating, drinking, running around like the others. Could this be a sign of a rooster testing out its vocal chords? Or is it something like hiccups? Very confused... and any help would be appreciated.