Frizzle cochin chicks - feather sex?

[CityClucks]

I just got some frizzle bantam cochins - 3 to 5 days old - and I'm wondering if they can be feather sexed like some other breeds.

Buff frizzle - I think pullet because of tail tufts and longer primary feather development. What do you think?

White frizzle #1 - I think pullet because of tail tufts and longer primary feather development. What do you think?

White frizzle #2 - I think cockeral because no tail yet and shorter primary feathers at this age. What do you think?

Thanks for looking!

 

[4-H chicken mom]

But if you take pics in different stages, you will be able to see if you were right in your guess. It is too early for me to tell. They are real cuties.