I assume it depends on the breed, but how can you tell a male from female just by comb and wattle? Are there also feather differences? Size differences? I have two black australorp's that I'm sure are roo and pullet. My two duckwings are different sizes and have different temperaments-one is much more ready to get in a tift than the other and he's larger. I also have a New Hamp Red that is ready to whoop butt and stare down an opponent than the other three larger chicks. Is that indicative of a roo? All of my chicks are 4 weeks old. I also have 2 bantam cochins-same size, but one gets in the middle of stare downs. The only one that has a noticably larger and redder comb is the australorp. FWIW, all of the chicks have girlie girl names! lol Is there any place I can go to see the sex differences of different breeds at different ages? Thanks!!