I had two eggs hatch on the same day, the smallest Roo started crowing about 16 weeks and he is the boss, the bigger one (Marans X) started 8 weeks later!!! His is a lovely deep crow not high pitched like his hatch mate!! I have another 6 Roo's (getting fattened for the pot) and they are just about ready to start, its gonna be noisy here for a few weeks!!