Are these roosters?

[robinSnest63]

 

[dan26552]

How old are they?

 

[Gray Farms]

Look like all pullets to me.

 

[Crazy for Chickens!]

All look like pullets to me except the red one in the third picture on the bottom. Not saying it is, but are those possibly some longer sickle feathers, or is that just the position of the chicken?

 

[Chick-Rock]

All poults, I've had similar issue before were some of my hens have longer tail feathered which naturally will curve down. Look at the feathers at the base of the tail see if they are pointy elongated compared to a positively identified hen.