Silkie gender?

[4chickns]

I know it's really early, they are only 2 months, but any guesses from the experts are appreciated. We have 7 chickens we hatched from Garry Farm. 2 I'm sure are cockerels and 2 I'm sure are hens, but there are a few I'm unsure of. Here are the 2 that have me guessing the most. The one in the first 2 pictures, and the last, is about half the size of the others, even though they hatched the same day.
Chick #1

Chick #1

Chick #2

Chick 2

Chick #1 again

Thanks!