We need better photos of combs/wattles and profile views showing their tail carriage to have a chance at it.
For my silkies I'm usually pretty sure at the 3 month mark on sex and absolutely positive once they start crowingIn all seriousness silkies are hard to sex unless you have one that grows and bulks out faster than the others. Welcome to BYC, I see that I was your first like. Please introduce yourself on the new member introductions and you will rack up a ton
if you like.