Could she be a he?

[speckledhen]

Pullet. Male BRs have much larger combs by five weeks and females do have combs like that by that age, just not red.

 

[drumstick diva]

I'm voting roo but, I would be very happy to be wrong.

 

[FRlEDeggs]

Roo, almost positive
The coloring looks pretty rooish

 

[LALASD4]

These are mine, they are 5 weeks old also, we must have got them at the same place.

 

[Jeeper1540]

I think its a little pullet who is developing her comb a bit faster