These are my two Blue Silkie Bantams. One is much smaller than the other and only one week younger. I know it is virtually impossible to sex young silkies, but anyone have guesses? The small one is 6 weeks old, the larger one is 7 weeks old.
You could also post your photos on the "Silkie Thread." where silkie breeders will get a look at them. My friend who has had silkies for many years rescued a 5 mos. old "apparent "pullet that started crowing and fighting with her rooster a few weeks later. She had to rehome it.
Nothing is positive till they either lay an egg or crow.