Sexing chicks with pictures help!!

[HarrySmallman]

can you please help me by giving me a rough idea of what sex my chicks may be?
i have 5 chicks all about 4/6 weeks old. i think three maybe 4 are cockerels (unlucky i know)
thanks

the first is a vorwerk, just over 4 weeks old (suspected cockerel)

next is a plymouth rock bantam just under 6 weeks old ( suspected pullet )

next is a Belgian Barbu D'uccle over 4 weeks old (suspected cockerel)

then a 5 week old silkie not sure with this one

and finally a barnevelder 4 weeks old i think its a cockerel

if you could give me any suggestions that would be great
thanks
harry

 

[ChickenLover200]

rooster, hen rooster, hen, rooster just my guesses

 

[imsocu01]

This posting was from a couple of years ago. So what did you end up having? I have a Belgium duccle Mille flyer that has a comb coming in like your first pic. Soooo. I was curious in how you made out?