The wire in the photos makes it hard to see the kind of detail needed to sex them. I'm confident that the chicken in this photo is a pullet. I can't see your other wyandotte well enough to be able to tell. Post a good clear photo of the other one from the side with the feathers on the back visible and I should be able to tell on that one too. A male will have thin, shiny, pointy saddle feathers by that age.Hi, These are my two 16 week old SLW I have never had young chickens before and these guys were 7 wks old when we got them from a hatchery. We have on two seperate occasions heard crowing early in the morning. Can anyone confirm for me if the bird in the top three pics is a roo? The last two pictures are of the other one who has taken to chasing the first bird in the morning when I let them out of the coop not sure the sex of that one either. They are also in with two black australorps which I believe to be females. This is a bit stressful waiting to see for sure as we have 7 almost 3 week old chicks as well and really do not want a rooster! Thanks for any input ;-)