is this silkie a cock?

[JBraz21]

At what age do Silkie Roos start crowing? I have what I believe is a roo. He's about 3 and half months old. No crowing yet and absolutely loves my hen. Can't be without her.

 

[KBgirls]

my silky was already a Year old when I got him! I would think he will start soon around 4 to 5 months old!! Hope that helps good luck!! FYI they are not that loud compared to the common roosters!! Good luck!!