Are my Marans all Roos?

[muckmuck]

Below are my 4 month old Marans, of the 3 number one sure looks like a roo to me. The one in the foreground I imagine is also a roo, but the one in pic 3 looks like a hen. What do you all think?

Thanks, Max

 

[chicklover16]

first one looks like a roo, the rest look like hens.

 

[ramirezframing]

1st pic roo 2nd pic roo in fornt with colored neck hen in back 3rd pic hen