18 week easter egger roo?

This is Rambo who I’ve been so sure was a girl but now I’m questioning? She is 17-18 weeks, Is Rambo a Roo?

Hi I’m a fairly new chicken mom as it’s been well over a decade since I’ve had any chickens. I thought I was getting 15 pullets. 12 Rhode Island Red and 3 Easter eggers. However I’m pretty sure I’ve got two Roos of each. The Easter eggers are roughly 18 weeks old these two are constantly...