No one should take lightly your comments, because you are obviously experienced and knowledgeable, but since the "they" referred to includes, presumably, The Livestock Conservancy and many others reporting similar experiences over many decades and across many different breeds, the moderator's explanation in Post #49 appears to me to have serious merit.......Even a cursory reading of the history of domesticated chickens dating back 10,000 years teaches me that, when it comes to chickens, anything can be expected...There are way too many people from separated places and with different agendas to state with certainty any facts except the most basic.......On a totally non-related note, The Livestock Conservancy is a great organization that deserves support from people interested in a revival of economically viable heritage poultry breeds.......Everyone's comments here are interesting....Thanks for the civility of the discussion...