I so hope the naked neck phenos also have crests.
Their crests looks like they can still see just fine, almost like a flat top to me.
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Some could have the crest, and some may not. It all depend's on if they inherit it or not from the rooster's if you breed them to the NN hen's. I have a hen here that had a Naked Neck daddy, and a Crested Cream Legbar mother. She has a little crest and lay's light green egg's, and has the bib from the daddy.