I am kind of new to ducks i have had them 2 years and I am still learning about them. i did just get cayugas about 7 months ago. Which i love the breed but the first thing I wondered was are they boy or girl. There are several ways to tell by about 2 or 3 months you can hear the difference. The females will Quack and it is loud and clear. The males will sound like they have a cold because theirs is more of a honk and it is raspy. The males tail curl at about 5 or 6 months. but there is a video which yes I have watch very good and i have learned how to vent sex my ducks. You may not like Metzer farms I know people have their own hatchery choice but it is very informative. Take a look. Thank you Metzer farm.