What gender are these silkies?

[4chickns]

Any guesses? They are almost 4 months. The three buff are the ones in question.
Thanks!
Number 1

Number 2 in front, 3 in back

Number 2

Number 3

 

[and-roo]

#2 is definitely a hen, I think #3 is also, but I'm guessing that #1 is a roo.

 

[4chickns]

Thank you! That was my feeling as well, but they have kept me guessing!