Duck questions

[lacychappell4]

I know the white is a Pekin
The black with the white chest is a swedish duck .
The other 3 are supposed to be swedish/ khaki Campbell mix but now I'm not sure ? Any guesses on breeds or genders .

 

[Jenbirdee]

They’re all pretty ducks! Mixes come out all kinds of different. How old are they? You can tell their sex by their voices when they come in between 6 and 8 weeks old. Only the girls will have a loud and clear QUAAAACK. The boys say something more like Cree Cree Cree.