I am having a time trying to figure out which of my chickens are roos. I am not even trying with the Silkies yet! However this morning, one of my silkies started making a funky noise that might have been a crow attempt. I was so excited! It was kind of Mah mah! LOL My Silkies kind of squeal and sound different than other chickens in their normal behavior. How about their crows??