hello nice to meet you!! what kind of sounds do your ducks make?
only females make the loud QUACK sound. males make more of a cree cree sound and they sometimes have a curled tail feather as well.
@Ginginp If I had to guess, I’d say these are both males, but voice-sexing would be better. Like Jenbirdee said, females make a loud QUACK!, and males make a quieter, raspy maap maap sound.
If either of them are male.. please keep them away from your chickens. A male duck mating with a chicken even once can seriously harm / kill a chicken.