I'm assuming these are Silver-laced? I raised the more common Gold-laced Barnevelders about 15 years ago. The roosters don't feather out with lacing. They were able to be visually sexed rather early. If the Silvers are the same (and I don't know they wouldn't be) I'd say by plumage alone you have pullets. I could be totally wrong though.
I feel like there are never three combs visible in the same picture or numbers so I'm confused as to which chick is which. That being said of all the pictures with a visible comb from the side, these are cockerels.
Can you number them to know which ones we're looking at?