HI, Either someone wasn't paying attention, or sex link gender ID is not entirely accurate - one of my "pullets" is crowing. I really didn't want a roo, but he can stay if he behaves - my question is, at what age would I see aggressive behavior if he is going to develop in that direction? They're 11 weeks now. I hope he stays nice; he's a gorgeous bird, though I don't know what mix of breeds - he's white with dark brown feathers on his back, like a small cape, and a few dark feathers in his wings, though you don't see them much unless he spreads them. Any ideas? Also, if he stays, are my hens likely to go broody, or has that been bred out of the gold sex links? Thanks for any input.