Thanks in advance
Welcome to BYC.. even Metzers staff can make mistakes ever seen the videos where they are sexing? boy are they fast. As for Golden Layer I don't know anything about them so can't say but does sound like you just happened to get a drake duckling along with the rest of your order.
Ducks can't turn into drakes, there have been hermaphrodite ducks, but that is extremely rare. It looks like Metzer made a mistake, sexing is never 100 % accurate, they move so fast, they could easily make a mistake. I love my Khaki Campbell drake. He is calm, quiet and is very gentle with the ladies. Are you going to keep him?
Here is GingerSnap - after his 4 month molt his feathers were very different, and he is the softest, fluffiest bird in the bunch. (he's the one flapping his wings)
Do you charge for your eggs and how much? Mine are maturing and have a few people that would like to buy them but didn't know what to charge. It looks like I have 4 females and 4 males probably have to find new homes for at least two males. And also do I need a license to sell the eggs? I was told I would have to take candleing classes and take a test. I am new to all this. Thanks.