I had a buff silkie I got at 6 weeks old hoping it was a girl. He just started crowing one day lol. But I noticed as he got older his pointed hackle feathers and saddle feathers. He also had a more pronounced comb... even though they have the walnut comb i could tell it was a little big. So thats how I tell now... i pick the silkie chicks with the smallest, flattest combs. Good luck!