behaviour indicative of silkie sex?

[HelenaJean]

i have some 5-and-a-half week-old silkie chicks and two of them seem to really enjoy sparring with eachother. It's always this pair as far as i can tell. They fluff up their feather and run at eachother, legs out for scratching and wings flapping. There's also a lot of hopping and sizing each other up.
Can this indicate roosters or is it normal sibling bahviour?

any insight would be greatly appreciated

 

[magicpigeon]

I wouldn't say that indicated rooster behaviour; but yes, behaviour IS an indication of gender. My silkie roosters usually show up at 5-7 weeks anyhow; by 12 weeks their gender is concrete. I advice looking more at the combs (how developed are they?), length and thickness of legs and of course how brave these are. None of these pointers will identify a rooster alone; you have to put them all together.
Good luck