Can you get some side pictures of them standing? From the side? Kind of like the following pictures (my silkies).
Maybe these pics can also help you in sexing yours as well, looking at other silkies helped me a lot.
Sunflower - Pullet - 10 weeks
Gracey - Unknown - 12-13 weeks (Most recently thinking he's a she, despite the tail..)
Willow - Cockerel - 12-13 weeks
Albedo - cockerel - 12-13 weeks
By 8 weeks, Albedo was crowing. Willow started crowing at 9-10 weeks but only after I separated him and Gracey from Albedo (usually only the top-rooster seems to crow, which is why separating worked for me.. some silkies do crow much later on though).
But the roosters stand much taller and are much more skittish. Their legs and feet are much thicker than Gracey and Sunflower's. Their faces look a bit different even- that is hard to explain and not always easy to.. see or describe.
They're usually a lot more noisy and tend to hold their tails up. Their neck feathers and head feathers tend to swoop out and up as streamers (you can see the ones on Albedo's head and Willow's neck).
Superchick does not seem to have streamers. It's hard to tell with Bathman because of the tiny crest. So maybe I can give better educated guesses with more picture Ever since I got silkies, I've been doing insane research on sexing them. Silkies are so stressful- I hope you don't have the same luck I did- getting 3 boys (unless Gracey really is a girl) at once.
From the side? Kind of like the following pictures (my silkies).
