Silkies are almost impossible to sex under three months old.... Even with people who breed them. Something that helps but is not always accurate is by looking at the comb. If you slick back their fuzz and run your finger over their comb area and feel a bump, then possibly it's a boy. Many girls keep a nice smooth flat comb area for longer. Also I notice a lot of boys have thicker legs and feet and their extra toes come out longer and more stick like than in many girls..... Other than that, as chicks, it's a guess.
