Hmmm..... maybe your chicks have some 'Ganoi' genetic in them, they are oriental gamefowls much like your Shamo / Asil variety but their variety have some that come with naked necks.
Shamo are oriental hardfeathers. Ga Noi is the Vietnamese version.Thai Game, or Gai Chon is the type from Thailand. (Shamo is a Japanese term for "Siam" which was the term used them for Thailand, making Shamos most likely a thai game derivative) Asil, perhaps the original version of all, is the name used in India and Pakistan, and most likely came from ancient Persia. Hint Horoz comes from Turkey (huge birds), Shamo comes from Japan. Malay and Saipan Jungle Fowl are totally made up terms that are used to describe more recent breeds derived from parent stock, in the Malay's case the huge Kulang Asil of Southern India, and the Saipan most likely a landrace for of Shamo gone feral.
Ga Noi, or more properly, Ga Noi Don, from Vietnam are not truly naked necked. They just have extremely brittle feathers. They do have a naked patch on the neck, on the thighs and shoulder points, and most notably the breast, as do almost all good representaions of the aforementioned breeds. They are perhaps the most brittle feathered of all, and they can appear naked. The Madagascar game, parent of the modern naked neck, took this trait to the extreme, and coincedentally comes from very near an island where there was an exhiled Vietnamese prince a very long time ago.
The Ga Noi Don is most pronounced in it's lack of feathers in it's first year of life, often growing full feathering in it's first molt, or rather growing back the feathers it lost brooding and constantly sparring with siblings up to the point that sparring became more deadly and it had to be seperated. Often, in Vietnam, the naked condition is prolonged by the application of tumeric, as a skin conditioner and tonic, one effect of which is toughening the skin, good for it's intended purpose. It's application, almost daily, retards feather development, also good, considering that their intended purpose is often non-lethal in nature, (some Ga Noi Don being actually bred without spurs in the males), a contest of will and endurance, and may last for many rounds in hot steamy jungle conditions. Also, prevents a grip from an opponent.
All of the aforementioned breeds are very similarin type and appearance, often being indistinguishable. For instance a Kulang Asil might be mistaken for a Hint Horoz, or what we call a Malay, unless it is of the parrot-beaked long tail strain of Kulang. One region within a country can have a version that mimics a "breed" from a different country. American and European show stock is often bred for exagerated traits in the areas of very subtle differences described in early writings of naturalists and explorers who were describing very subtle differences, often found in only one regional variant, as is the case with Shamo.
So similarity exists in all the aforementioned breeds, and even the diluted hatchery stock.
