Vet is stumped. Roo or Pullet

[Brunoschicks]

So, My wife and I are new to this whole backyard chicken thing. We did a research, picked our chickens, got approval from the city of Columbus, and even had our chickens checked out for gender by our vet. Three of our chickens came back as ladies. However, one rather big Barred Rock was left unsure. She’s bigger than her Hatchmate that came with her and has prominant Tail feathers. What do you all think?

 

[NuggetTheChicken]

Pullet

 

[NuggetTheChicken]

How old is she?

 

[BudgieKing15]

Pullet.

 

[Oncoming Storm]

Pullet. Barred rocks male and females have different colorings. Pullets/hens have thin white bars on black feathers while cockerels/roosters have thin black bars on white feathers.

 

[PioneerChicks]

Pullet, probably head of the pecking order. Very pretty girl!

 

[FluffyBottomBantams]

Big Pullet

 

[Brunoschicks]

Wow! Holy moly! That was a fast response. Thank you so much all. She is 6 weeks. His/Her sibling is in the background and has almost zero tail. They got their first check up today and our vet was stumped!

 

[Brunoschicks]

How old is she?

6 weeks today

 

[NuggetTheChicken]

The tail feathers usually don't mean much, unless they are pointy. Usually the comb is the tell tale. Hers is small and orange, not large and red. As stated by @Oncoming Storm, the coloring is different for each gender. Females have double barring genetics, which ends up in small stripes of white, larger of black. Males have only one barring gene, so they have large stripes of white, and small stripes of black.