Sexing these birds new chicken mama

[Redabass]

These guys are about 8 to 9 weeks old the first two pictures I believe are cockrell's but I'm not sure about the last one x2pics

 

[fluffycrow]

They're all cockerels

 

[Redabass]

Thank you for your reply so quickly and damn LOL

 

[Redabass]

They're all cockerels

The black one attacked one of the other ones should I separate them all

 

[Gavinthechickenman]

All cockerels

 

[fluffycrow]

The black one attacked one of the other ones should I separate them all

Do you have other birds? What gender are they? If they are all males, I wouldn't bother