Comb height to decide gender?

[K7 Menagerie]

I have 6 EE chicks, about a month old. All were supposed to be pullets (90% accuracy guaranteed). None have any redness, but one chick does have a much taller comb than the others. How big a factor is comb height in determining gender? Thanks!

 

[Josie]

I think comb is a very important indicator. As far as accuracy goes, it seems to win out over color and disposition most times.

 

[Gindee77]

Using the look of the comb (and their feathering) is how I figured out the gender of all my EE chicks. The boys had definitely wider combs with three raised lines that extend from one end of the comb to the other. Two of them even started to turn red at 5 weeks old, right before I gave them to the lady who's taking all my roos and extras. The three I kept, due to them having very narrow, one-line combs still have flat, very minimal combs with no red yet, at 7 weeks. Two of them have a tiny tinge of pink starting in their combs, but the combs are still very narrow. Of course, this gender thing is always subject to change!!