One of my 8 week old wyandottes has started to whistle. It kind of sound like one of the birds that hangs out in the tree next to the coop. If I make the same noise, it will do it right back to me. Any ideas as to what it is doing? None of the 11 other birds I have do this......I hope it is not trying to crow as it is supposed to be a hen. I have never heard a chicken make this noise before.