Pretty sure these are all girls but I'm not 100%

[RingosGarden]

They're about 2-3 weeks.
I'm pretty confident in the breeds (except my Campbell is getting a floofy head so ??) and the person I bought them from said there's a 5% chance that I could get a rooster. Just curious to see if they're all girls. You're all the experts!

 

[lomine]

I'm no expert on chickens but it's a bit too early to tell on the chicks. Just wanted to reply to say that all duck breeds can be crested. Your duck does look like a KC.