Mine did the exact same thing :( had red female-like breast feathers come in and then the next week all black and started crowing at 4 weeks... Such a bummer!
#1 looks like a blue silkie
#2-#3 I'd guess splash silkie since lavender silkies are still pretty rare iirc
#4 need more photos
#5 the light feathered legs and small comb (assuming pea comb) would mean brahma
#6 doesn't look to be frizzled, if it has a straight comb and feathered legs I'd bet...
Just thought I'd update y'all on Rudie! He's feathering in well now, we're pretty sure he's gonna end up being a pullet and is developing the same as our other ladies currently! Thank you all for the reassurance, I had never had a chick feather that slow before, out of hundreds over the years...
#1 blue Cochin (might be black) looks like a pullet for now
#2 red Cochin Cockerel
#3 red Cochin maybe pullet
#4 gold laced Cochin, looks like a pullet for now
Silkies are probably still a bit young to accurately sex, although I don't see any egregious comb development
#1 white silkie
#2-4...
1. Small comb, looks like pullet right now
2. Comb is pretty wide & red for the age, leaning cockerel. Lots of white in the pattern, usually means boy.
3. Comb also pretty red for the age, assuming cockerel
4. Color and comb looks like pullet to me
5. Part silkie so this one may need longer...