Do boys or girls tail feathers grow first

[Hdomaille]

Have conflicting advice

 

[rosemarythyme]

Generally females will. But this isn't set in stone.

 

[Peppercorngal]

Yes, pullets tails grow more rapidly than cockerel's!

 

[Hdomaille]

This is lucky. 2 weeks old

 

[GC-Raptor]

I wouldn't go by feathers on Chicks, unless they were bred to be feather sexed, and then it's wing feathers, not tail feathers.
Another type of feather sexed is sex-links.
Red sex-links males are lighter in color than the females.
Black sex-links males have a white spot on their head, females don't.
Here's my Red sex-links yesterday at 15 days old.
All are females. Some have fully feathered wings with tail feathers over a half inch.
Some have less feathering on wings and no tail feathers.

GC