Roos or hens?

[SpotTheCat]

Almost 3months

Front one is a cockerel, back looks like a pullet to me

 

[Lindsaylady]

Agreed. Could you get a better picture of the other 2?

Age?

3 months

 

[Lindsaylady]

Age?

3 months

 

[Frazzemrat1]

I don't think so... We're not 100% sure of their age

Almost 3months

I misunderstood, I thought they were 15-18 weeks. I missed that this information didn't come from the OP.
That said, I agree with the others... the one in the foreground is a cockerel.