Size of comb can tell a lot when you're comparing among the same kind of chicken, at the same age. But some breeds naturally have larger combs than others, and some have combs of different shapes. #8 has a single comb, #9 has a pea comb--it's wider, lower, and differently shaped. That makes it hard to learn anything by comparing the two of them with each other. I think #5 with the very small comb has a pea comb as well.
Chicks that have a barred mother and a not-barred father can be sexed by color (the mother passes barring to her sons only). But a Cream Legbar
father passes barring to both his sons and his daughters, so it won't help in sexing
these chicks.
My guesses on gender:
1 male?
2 male??
3 female
4 male
5 ????
6 female
7 female
8 male
9 male?
The number of question marks is a marker for how unsure I am