This is funny. I had a hen that crowed for a while but she settled down after she became the dominant hen. Now one of my younger girls has decided to have a go at crowing but manages only a squeak. She also squeals with excitment when I go out to feed them. Scared me the first time I heard it, sounds like a child shreiking. I didn't realise hens made so many different sounds. My best layer makes excited chuch chuck sounds as she dashes off to the nest in the morning (no she won't lay in the box, but under a bush that she chose) then she sits there growling and chirruping until the job is done, then she does the egg song for around 10 minutes..