Help sexxing 9 week olds-BR, Partridge Rock, SLW, EE, Light Brahma pls

[BirdsinBethel]

Anyone want to take a shot at sexxing some 9 week old (& 1 10 week old) chicks?
They're a barred rock, easter egger, light brama, silver laced wyandotte, and partridge rock.
The EE is a week older than the others; the partridge rock didn't grow as fast as the others and is much smaller still and is just getting neck feathers in.
So far no crowing, but they're definetely starting to cluck!!!

Peppermint Patty/barred rock

Cadbury/Easter egger:

Marshmallow/Light brahma:

Oreo/SLW:

Toffee & Oreo (they wouldn't pose nicely):

Toffee/partridge rock:

 

[sonew123]

Oreo looks to be the only roo at this point! Thats a maybe on him too