Hi, The only Pyncheon's that seem to be available are through the hatcheries. And they don't appear to be pure. The couple that Do have them all get their stock from the same source -- they have them drop shipped. So it doesn't really matter who you order from. Stromberg's reduced their minimum to 15, while the others still require 30. The thing is, you may need to get 30 chicks to pick out the handful that meet the breed standard. Right off the bat, the chicks should Not be yellow, but be buff/tan. Then the "right" way they develop the mille fleur coloring is that they start out fairly solid colored and the pattern develops over time. The birds that immediately develop the mille fleur coloring as they grow the adult feathers will wash out to white by the time they're 3 or so years old. It seems to be that there has been a lot of outcrossing, especially to Old English, to attempt to correct deficiencies. In my search I saw a lot of huge combs, washed out/faded birds, wrong shank color, etc.
Now interestingly, in the Fall, Rusty Hart, "The Guy" who has been working on this breed for the last couple decades, out of the blue popped onto the Pyncheon Breed Group on FB for about a milli-second. I asked him if there were any out-crosses that he could recommend to try to bring back missing characteristics or strengthen the breed. He gave a very short answer that came down to 'no'. Sooo, I don't know. I rolled it around for a bit, and then actually canceled my hatchery chick order and am holding off on them, and am just focusing on Nankins for now.
Whomever has good, clean, close to SOP stock, if any, are holding them close to their vest.
