Mille Roo?

[Haylo12]

I got a pair of Mille Fleur d’Uccle bantam chicks last week and they hatched March 25th. The lady did not know gender and last week, both combs were the same. This one is the smaller of the two but “his” comb just magically appeared this week lol. I’m guessing Roo compared to the sibling that has no comb at this time. Am I correct?

This is the other one:

 

[NatJ]

I agree that the one with the larger comb is probably male. The other one, I wouldn't want to say until it's had a few more weeks (because chickens develop at different rates, and it could be either a pullet, or a later-maturing cockerel.)