Pullets or roos?

[Msyr]

Hey, I have 6 chicks that are about 4 weeks old. I'm uncertain about the breed, but they're possibly a mix between these: australorps, orpington, faverolle, silverudd, sussex, pavlovskaya and cream legbar.

#1 and #2, the two darker ones, seem like pullets, but I have no idea regarding the rest... Due to the size of the comb and aggressiveness of #6, I do assume it's a roo, but it might be too early to determine.

 

[my gang eats grass]

the last two look like cocks to me.

 

[TinyRaptorDodos]

Last two look like Roos, the rest should be pullets. Not all Roos are aggressive, mine isn’t, I only know he’s a roo cause he’s a breed I could wing sex and his comb