Well, honestly, I think the question is premature. Most breeds that have rose-, walnut-, strawberry-, and peacombs show little - no sign of any sort of comb at this age (I assume this bird is about a month -1 1/2 months old). Also, since you didn't breed this bird, you have no reason to assume that it is purebred. But that's not a bad thing at all. But since it may be a mutt, you have to also consider traits it may have that will make it difficult to sex. It seems to be Gypsy-faced (the face skin is purple - black), which often makes hens look like babies and rooster look like young hens. There are a few common breeds that carry this gene (Sebrights and certain OEGs come to mind). Also the Sebright and the Hamburg are henny-feathered (Roos have no Sickle, saddle, or hackle feathers, making them look like hens). And then, my guess would be It has Naked Neck blood. Cochins, Pekins, and NNs are the only breeds were frizzling is common. And out of those three, the NN is the only one that doesn't have the feather-legged gene in it. Plus, your bird seems to have a naked neck. So I would guess if it's a bantam: Sebright X Frizzle NN. If it's large size: Frizzle NN X Hamburg. If none of this helps, and it grows up and you still can't tell, there is always one certain way to tell what gender it is: wait for it to mate. But I hope all this helps and you don't have to wait that long.