I have 2 Swedish males and 4 females. The males are bigger and quieter. The offspring will be 1/2 blue, 1/4 black, and 1/4 silver. They are supposed to be a dual purpose breed.
I just ordered 10 giant pekins from Metzer's and they sent 11. All of them are doing great. I couldn't be happier with the quality of the birds and customer service I have received. They have ducks year round unlike many places. Go on their website and read about the different ducks. Good luck!