Barnyard mix

[CrashingPines]

Hi all, these chicks are 7 weeks old, all hatched by a broody Orpington. Only one (black and white chick) is her own. My rooster is a Buff Brahma.
The other eight chicks are full Brahmas and Easter Egger/Brahma crosses. I’d love to know if any ideas can be made on their sex. Their combs seem to be the same. One, the last to begin feathering out, is very gawky and seems to have thicker legs, so I’m guessing a cockerel.
Thanks for any input!

 

[Silviaschicks]

her chick looks like a roo. could you try to get close-ups of their combs?

 

[Ruthster55]

The black and white chick is a cockerel for sure.