HookLineSilkie
Songster
Did you hatch them yourself? So COOL!!! 

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1 and 3 are boys. That orange is a common variant that shows up in partridge roosters. I think I may have finally eliminated that gene in my flock, but then I thought I got rid of the moorhead and 3 generations down one popped up. (I've been trying to breed for the written standard for partridge color. The moorhead are pretry though.)
Number 2 is a pullet. Hopefully she keeps those nice feather markings in the adult feathers.
He should still throw partridge colored offspring. If he grows up with good conformation he'd be good, just not for show.
One of my first and favourite partridge roosters was orange. He was a sweetheart to people, but a terror to any other breed of chicken. He had all the large fowl fleeing in terror at the sight of a silkie. He beat up all my poor ameraucana roosters.
I usually keep pullets until they are at least a year to see how they turn out unless they have a disqualify fault like split wing or wrong number of toes. I'd keep her and see how she turns out.