The Bantam rooster who is with my laying flock always makes a funny noise when he sees me. It's a sort of scratchy long drawn "yiiieeeep" sound, a bit like he's choking on something. Totally different from his crowing or the noises the hens make. Is that a warning call? A challenge? His way of saying hello? I should add, he often puts himself between me and the hens but then scuttles away with them. He's never attacked me.