I've got 6 fawn and white girls. Only ONE is a loud mouth! Just one and it's really something! The other 5 girls are quite. My one little drake (the black one in the avatar) sounds like a little frog. So I guess it just depends on the ducks, at least in my duck world. Kinda like some people are loud and some aren't. The females will mount each other "in season" and that is normal. Not sure what they think they're doing but they do it!