Gold Buff Orpington rooster?

[GSCforester]

We just hatched out some Buffs about a month ago, and several of them have significantly larger combs than the others. Is this a sure fire way to tell if they are roosters?

 

[NYRIR]

I would try to post pics in the what gender section...it may still be a bit young but some on here are REALLY good at it... Good luck