Sexing help (saxony and blue swedish)

[LtDanFan]

I need help sexing my 8 week old ducklings. 2 are saxony, one is (i think) blue swedish. Coloring on that one changed overnight at about 4 weeks of age and it looks nothing like the saxony’s or ancona it hatched alongside. The bill color is more of a slate blue/grey and the colored feathers are very light. Sounds like it has a loud quack but im not sure at this age if the voice differences would be apparent. I’ve read different opinions on sexing young blue swedish ducks.
The other 2 are saxony ducks. Any thoughts on these littles?

 

[urlocalcrazychickenlady]

Both saxonys are girls! Congrats can't say tho about the others…

 

[urlocalcrazychickenlady]

You should be able to voice sex now!

 

[urlocalcrazychickenlady]

Females: classic duck quack
Males: raspy, quieter quack

 

[LtDanFan]

Both saxonys are girls! Congrats can't say tho about the others…

That’s what i was hoping for.
They all sound loud and obnoxious so i was hopeful that i ended up with 4 girls. Out of 21 heritage eggs (7 each of blue swedish, ancona and saxony), only 13 were fertile. Of those 13, 6 hatched and of those 6, one aspirated (i think) and one drowned. So i was hoping that i have all girls with what’s left.
Any other opinions on the blue swedish. Or whatever breed it is lol.

 

[Jenbirdee]

I can voice sex sometimes as early as four weeks, definitely by eight weeks