can you tell if these are pullets?

[jbreeden00]

My buffs were sexed but my other two breeds were from straight runs. I think both of my welsummers are pullets, but unsure how to tell with the americanas. I tried doing the wing length thing but they were four days by the time i figured out that method, so i was unsure if I was looking at them right.

 

[3riverschick]

Well the head stripe seems to say they are at least heterozygous for
the e+ (wildtype) locus. In that locus, the female head stripe is usually
darker than the male's. Maybe that helps.

4 days shouldn't be too old to wing sex the chicks. I can wing sex
my Light Sussex at that age.

Best,
Karen