I'm anxious to hear crow(s) from my baby roos. Don't know why, since they are living right under our bedroom window I tried the rooster ringtone on my cell phone yesterday. It never fails to set my adult rooster off. If I play it for him once - out of sight, but where he can definitely hear it - it gets him crowing non-stop for at least half an hour. Tried it on the baby roos yesterday and not one crow as a result.