For the longest time I was SURE he was a girl. He was the smallest, by a lot, and took forever getting his feathers! At 10 weeks my hubby pointed out his red comb and was concerned he was a boy. I posted his pic on the BYC forum and had a unanimous response that he was male.
And now he's crowing. Yesterday we thought we saw nubs where the spurs will grow. Someone else mentioned pointy saddle feathers, too. It's really sad because he was the favorite but we live in the city and noisy roosters are a no-no. At least he's going to a good home.