Me again, lol. I have a few "mystery chicks" that came in an "Assorted Brown Egg Layer" assortment. I think I have most of them identified, but I have one that is yellow with silvery-grey around its eyes and forehead, and another that is yellow with brown and white striped feathers coming in on its wings. Both of them have single combs. I have not been able to find what they are and I know NN's are a possibility... but I haven't been able to find any good pictures of NN chicks to compare with. My son is rather afraid of NN's... so I'm hoping they're not those, lol.