I purchased 2 white straight run day old silkie chicks the end of October. They are now 17 and a half weeks old. One is definitely a male. He has his comb and wattles, and has trying out his "new voice". The other one that I'm unsure about, has a very small (almost non existant) comb, tinier wattles and I'm unsure about whether "it" has crowed. Below are pictures. Sorry they aren't better. Any guesses?