This is our duck, Duck Wing. We got her at an auction. The guy we got her from said he has a lot of muscovy ducks. So far she whistles and occasionally quacks. I have not heard her hiss.She is in a pen with another full grown male pekin and is much smaller then he is. She waddles like a pekin instead of doing the head bobbing walk like muscovys. But she has a little bit of red on her face and whistles. So is she a mix between a muscovy and a pekin? Is it normal for muscovys to quack?