Pigeony
Songster
Unfortunately I think all are male, the 1 who doesn't have saddle feathers yet might be just a slower maturing Easter Egger male with a pea comb. In the group shot I see blotchy coloring, pointy hackle feathers, and shiny green-black feathers growing in his tail.The one in the lower right is the only one with no saddle feathers. The others feathers appear to get larger by the day.
Photo of the 1 that may be a female.
How old exactly? If it was a pullet getting that red, it would be at point of lay, so probably around ~6 months. I'm guessing these birds are a bit younger than that?