First of all, the correct name of the breed is Naked Neck, not "turken". "Turken" was devised at a time when more of the public were rural and ignorant, before we became more educated as a society, and before many of the consumer protection laws were around to help call attention to the need for a little truth in advertising. Created as a clever marketing ploy by enterprising hatchery salesmen, it combined the word turkey with chicken, due to the breed's appearance, in the hopes that the ignorant massses would fall for it, wanting such an oddity as a cross between a chicken and a turkey. This of course cannot happen, in a true breeding, sustainable form, and the Naked Neck breed is 100% pure chicken. Still, the hatcheries unfortunately persist in continuing to use the incorrect term. Do not refer to these birds if you see them at a show as turkens, or you are likley to get a rude education by the insulted breeder who has put years of work into his quality stock, and who prefers to call them by their correct breed name, as officially recognized by the American Poultry Association.
Second, it is possible to breed the naked neck trait on to a bird with a Polish crest, but it is not simply a matter of crossing the two in one generation, as many believe. Despite the incomplete dominance of the naked neck trait, there are other things to consider, and you'll have to educate yourself on basic genetics in order to achieve it. I'm not in favor of these cross bred "breeds" simply for the sake of creating something new and crazy, so you'll have to look elsewhere for that information.
