Hi!! I am wanting to see if anyone can help me tell if my Khaki Campbells are males or females. They are about 7 weeks old now and we are new duck owners. I know that the males usually get the darker head and the curled tail feather but everything I read said that is usually when they are a bit older. So I was trying to see if we can tell by their sounds. Would love to hear all your opinions!! Thank you