breed and gender ?

[Ahonahome1018]

Kal046 Could very well be, I'm not sure. Could even be Marans I'm not very familiar with the feather legged kind, sorry and wish I could help more with those. I do have several Delaware though some around the same age and they look exactly like yours, yellow legs with no feathers, light black barring in all the right places.

 

[PirateGirl]

Also due to the barring on the feathers around the necks of the white ones I suspect the are cockerels. Its somewhat difficult to tell in these pics, but will be clear in another 2 weeks or so.

 

[CannedMonster]

If they’re all the same age, I’m pretty sure the red bird on the right in the first photo is a cockerel.
The comb and wattles are much more developed than the others.

 

[Crazy for Chickens!]

They are mixed

Also you have a rooster in there.