At 16 weeks, those are definite pullet feathers, but that comb is gigantic and red, much bigger than a point of lay pullet. The feet look normal for a pullet, but the crowing…and that stare… I dunno. It’s pretty rare for pullets to crow, however, it’s more likely older hens that do. I’m going to say slow-developing cockerel. But please update, I want to see how this one turns out.