Help feather sexing my Marans chicks

[soukilee93]

I think I have figured out these chicks sexes but am not sure if I am right or if you really can feather sex all breeds. I found this awesome site that showed me the difference in the pullet and cockerel wings at about a day old. Any one out there able to help?
Pullet


Pullet


Pullet?


Pullet?


Pullet?


Cockerel?

 

[soukilee93]

One week old....

Granola....cockerel?


Stormy....pullet?


Virginia...pullet?


Liberty....pullet?


Vanilla Bean....pullet?


Shadow....pullet?

 

[soukilee93]

Two weeks old....
Granola...cockerel?


Shadow....pullet?


Vanilla Bean...pullet?


Liberty....pullet?


Stormy...pullet?


Virginia....pullet?

 

[soukilee93]

Here are my chicks at three weeks....

Granola


Virginia


Shadow


Liberty


Vanilla Bean


Stormy



Here are my chicks at four weeks....

Virginia




Stormy




Granola




Vanilla Bean




Liberty




Shadow

 

[soukilee93]

Nine weeks now....

Shadow - Definite pullet


Liberty - fearing we have another ROOSTER


Coppertone - formerly named Virginia - Definite ROOSTER


Stormy - holding out hope its a pullet


Granola - holding out hope its a pullet


Vanilla Bean - Definite pullet

 

[Chookie7]

I was wondering if Stormy and Granola happened to be pullets or cockerels. I know it’s been many years since this post, but I love how you showed the progress. Thank you for that. Granola to me looks definitely like a roo in all photos, especially the last one. But Stormy I had doubts (good size wings to be a Pullet, but no early tail feathers and showing an early wattle).