We had our chicks outside for quite a while earlier today, and I noticed one has a much larger comb than all the others. Then, my daughter noticed it has the beginnings of a wattle. We got them as day old chicks, so they are all the same age. They are all supposed to be pullets, but I know there is not a 100% guarantee! Anyway, having a roo won't be horrible. They grow to be good protectors of the flock. Here's a picture of his face: