I wouldn't try and determine sex of a silkie based on their behavior. Silkie girls will also spar with each other. It's just the way they find their pecking order.
Quote:
How? Just curious.
They mature faster, they lay earlier. Pet quality cockerels usually start getting their combs alot earlier than better quality birds.
It takes anywhere from 4-6 months maybe longer to sex a breeder/show quality silkie, but you can sex a pet quality silkie alot earlier. This is way too young to sex.