Sexing Five Week Old Mixed Chicks

[The LRR Coop]

Hey y'all!! I've learned so much from Back Yard Chickens! Thank you to all that take the time to respond. Sooo, I've got some five week old chicks and I'm trying to sex them. #1 thru #4 Are Black Copper Marans and Gold Partridge Brahma. The rooster is my avatar. My guess is that #1 and #2 are pullets, #3 and #4 cockerels. Necks and stance are different.
The other one is a cross between Easter Egger (hen) and Buckeye Rooster. I'm guessing/hoping pullet. Input welcomed!! I'm trying to learn! TYIA

 

[oldhenlikesdogs]

They currently look pullet, but give them another week or two. The red one may be a boy if that comb gets red.

 

[The LRR Coop]

They currently look pullet, but give them another week or two. The red one may be a boy if that comb gets red.

Thank you!