10 week old barred rock crowing???

[Chels21]

I'm a first timer, and one of my four barred rock's started making an odd noise. I'm worried that she might actually be a he. Also, could I get some help identifying if the others are pullets/ roos?

Here is Lafawnduh making the noise plus a pic...
[VIDEO]

Summer

Lemmy

Big Bertha

And lastly all of them together..(sorry abt the video quality)

[VIDEO]

 

[TheTwoRoos]

Normal talk,all pullets.

 

[Chels21]

Okay good. Thanks for taking a look.