My oldest Delaware just crowed for the first time, that we know of, yesterday. I was watching a video on the net when my wife came in and said he woke her up crowing outside the bedroom window. I listened and sure enough he crowed several more times. This morning he was crowing within just a few minutes of the coop being opened. He continued for about 30 minutes and stopped for an hour or so and then had another crowing spell with 8-10 crows. He is not the biggest, but he is dominate. Neither pullets nor other roosters mess with him. The good part is that he is not aggressive and mean to the others. He just does his thing, minding his own business unless someone gets in his way. He is 19 weeks old. I thought none of them would ever crow, but now he has made me proud!