Since he's a young bird, (I can tell just by looking but before you get the hang of that, I would say anything below 16 weeks is pretty young for a Silkie) and he looks somewhere between 8-12-ish weeks. Since he has a bright red comb and is young, he is a cockerel. Now if this bird were 4-5 months that rule becomes questionable because it could be a pullet approaching sexual maturity. At that age, streamers and shoulder patches would be pretty good indicators!Can you please tell me how you decided it's a boy? I have 4 chicks and can't tell anything. I'm desperate to learn.