Wing shape

[jaywin]

Hi does anyone hold any store by the sexing of chicks depending on their wing shape?
so straight edge for males and with a ‘ step’ in for females?
I have 19 and there are definitely two wing shapes amongst them. 10 girls and 9 boys I reckon if wing shape can be trusted.
they are 3 weeks old and the ones I think are boys definitely have cockerel behaviour but there is one girl who is twice the size of all the others and she is bossy to the boys but I think it because they challenge her as she is big?

 

[Justso]

I know it's a challenge, but can you get pictures of the two wrong shapes?

 

[jaywin]

Hi
Had to come in back to work so will get photos later !

 

[jaywin]

Ok got some pics now, so I think one and four with the two feather lengths, so a kind of stepped line are girls and two and three with the same feather length all along wing are boys?