At 4 weeks there is a BIG difference in comb size between the chicks. There are several breeds put togther. Is comb size at this age good indication of sex?
1- female RIRs
2- male, but not sure on breed. (could be black star or australurp.)
3a- same as above.
3b- looks like an EE to me.
4- male. idk, they could be white rocks, leghorns, or cornish.
5- female. WR, WL, or C. (same as above)
that's the best i can guess, the white ones are hard to tell.