Sexing help?! Barred Rock pullet or cockerel??

[Abby1116]

Hi all! We are fairly sure three of our four chicks are pullets but are unsure about the Barred Rock. I’ve been reading through several threads and still cannot tell. Photos below - chick is about 2.5 weeks old.

 

[MountainWoman73]

Too early to tell. Also, when you retake photos in a couple more weeks, turn the red light off so we can see comb color.