12 week old Light Brahma Hen or Roo?

[lattelover]

I grew up with chickens at my parent's house, but this is my first time owning them myself! We bought our Light Brahma chicks from Tractor Supply. They said they were pullets, but we're thinking Twinkie here might be a roo! Can anyone help us?

 

[fluffycrow]

Definitely a cockerel