I am hoping a silkie expert can help me here. I have 4 blue silkies that are between 15 and 16 weeks old from Cackle Hatchery. I am trying to determine male or female. The first 2 pictured are slightly bigger than the other two. None of them have any noticable combs or waddles. Silkie 1: Silkie 2: Silkie 3: Silkie 4: Thanks so much for your help.