Roo or Hen?

[Mike5878]

We are new to raising chickens. We have 5 pullets that we have raised for about 5 weeks. This one Road Island Red is about 5 weeks old and looks different then the others. We are thinking it is a Roo but wanted to get some other opinions.
Thanks for the help.
--Mike

 

[HappyClucker7]

Looks like a cockerel.

 

[black_cat]

Looks like a cockerel.

x2.

 

[Mike5878]

Thank you all for the replies.

 

[The Happster]

Very probably a roo, but keep an eye on it.
RIR are fast developers.

 

[Rhodebar Lover]

Definitely a cockerel!