Question about roo behavior...?

I have some suspected roos (I've posted pics before). When I moved my girls outside this past weekend, I didn't like the way my suspected roos were acting. They are not as nice and I didn't want them messing with my sweet gentle girls, so I kept the 2 inside.

I thought I'd give one a chance and just brought one out. When I brought him out there, he (?) just got this stance about him just *looked* like a roo to me. His posture and his tail sticking up in the air (my girls tails were down).

"He" is only 7 weeks old, so is that even possible?? Or am I just crazy??