Are these roosters?

[PhiberOptikx]

They are all 14 weeks. Thanks for all of the responses.

 

[K Spot]

How old is the silkie? I'm not seeing anything screaming cockerel, but age is important.
the second bird is a pullet
Number 3 and 4 are cockerels.

I agree

 

[drumstick diva]

The silkie is a pullet - the others, I am confused over so many pictures and wondering how many different birds are among them.