Thanks for the post, John. As you know, I'm NOWHERE even close to being up on genetics as you and many others on here are. But I am convinced that it must have to do with some gene(s) somewhere. Why? Precisely because of what you said. All my birds are basically on the same food, water, & other environmental conditions.
Patti adequately described my birds molting too. If it were not for new feathers in the pen ever single night, you'd never know they were molting. They literally take months. Whereas that MRO I mentioned before, and a Black Langshan female I had that I didn't mention, both go from fully feathered to naked to porcupine to fully feathered in a month or less. It's truly amazing to see them.
I still hold out hope that somebody has a Meredith line bird with the fast molt. And should anyone ever see or hear of that PLEASE let me know and the owners know I'd love to talk with them.
Btw, just a heads up, I plan to make a post here sometime soon with pics of a young pullet that I recently sold. Some may recall a few years ago that I posted pics of a REALLY ODD looking Wheaten that I described as "mottled" due to a lack of anything else I could think of to call it. It was black and brown. Well, I hatched another one this year. It's about 3mos or so old and a gal wanted a "blue egg layer" so I sold it. And then after I had committed selling it to her I got to thinking. That bird, as you'll see had full black tail and wing feathers.
Now I'm wondering if I shouldn't have bred it and toe-punched the offspring to ID them just to see what their tails and wings turned out like. So, for genetic gurus out there be looking for that post from me and thinking about the genetics part of it. Who knows? It's likely I imagine that I'll see that again,.