Millie is about 2 months old and is a Buff Orpington pullet. She chirps frequently, but the last couple of days she also lets out a shriek, similar to a hawk's call. I don't see any sign of her being a rooster, but the noise is really odd. She gets along fine with her 2 sisters and is eating well. She doesn't seem distressed at all. Help! Why is my Peep pretending to be a hawk?