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See the quoted. It still does not rule out vitiligo as OP is hoping.

Yes, a complete lack of pigment fluoresces bright white no matter what has caused that lack of pigment. It's not something specific to vitiligo. Which, again, you would have gotten if you had read past the surface on the subject. 🙂 At any rate, I'm unfollowing again, just thought you should be...

Not saying what it is or isn't for your birds, but vitiligo in poultry does not impact the deposition of carotenoids in the skin, for the record, only the deposition of melanin. Smyth line birds were bred from Brown Leghorns and had yellow skin even after their vitiligo was triggered. If you...

You know, I started to write something, but it's really not worth the frustration. You are convinced that your way is the only way and will not be convinced otherwise, so I'm out. Enjoy your 'experiment'.

You don't have to have a property adjacent to a crop field or any sort of lawn that's sprayed with a pesticide or fertilizer in order for it to contaminate your soil or water. If that was the case, then we wouldn't be finding chemicals and fertilizers from farming all the way out in the Gulf of...

Runoff from farms, especially crop farms, can be a huge environmental contaminant as well, for the record.

Yes, but the wind can carry things very far, especially tiny particles. :idunno Just be safe, I guess, that's very scary to me. Things you're exposed to now, even if it's a tiny amount, can have a huge impact on your health through the rest of your life.

I mean, things can change subtly. Water and soil can be contaminated even if it's not always something that you physically see happening. During my ecotoxicology course in college, we went to a seminar about a town I believe here in Indiana where one of the factories running nearby was...

You keep finding more and more birds with this going on. Have you at all considered that there could actually be an environmental cause rather than a genetic one? How would all of these completely unrelated birds otherwise spontaneously start losing pigment all at around the same time? I would...

You are absolutely correct, I didn't even connect that it was mother to daughter. Barring and its alleles being sexlinked would not pass mother to daughter in birds. I was kind of wondering about mottling as well because of the white tips on many of the feathers shown.

Okay, I do sort of vaguely see a bar and a half in this feather, but not in the others. 🤔 Perhaps something allelic? I've heard of an allele of the barring gene that causes further loss of pigment than just the white bars typical of the barring gene. Splash is a variety with partial...

I don't see cuckoo there, either, just one stripe, a white tip, and some fading. That doesn't really scream 'barring' to me, I guess. I didn't notice the one off to the side when I looked at the pictures initially, but I looked at Flury (my Splash Cochin) this morning and she has some of...

Hmm, I don't see barring, not in the sense of the barring gene anyway. 🤔 Looks more like the follicle was struggling to apply an even coat of pigment to me. It sort of reminds me of how there's a black line between the white and reddish parts on mille fleur feathers, but much lower down on the...

Oh, I meant the split color feathers for being a pigment distribution mechanism versus something genetic, not the white splotches like your birds are getting! As you pointed out as well, the split-colored feathers seem common to Splash-colored birds, which is why I'm thinking that.

Interesting. Maybe instead of a genetic relationship it's simply a matter of the mechanism through which pigment is distributed in a partially pigmented feather? 🤔 Here's the feather from my Splash Cochin hen, I knew I saved one back! Hard to get a good picture as I didn't want to take it out...

I have a large fowl Splash Cochin hen who actually gets feathers like that all the time! Any blue in their background? I can't remember if I've saved back any of her feathers, I'll have to look in my feather collection. She is not cooperative for pictures so would be hard to get any pictures of...

Dang, that looks pretty spot on for how Mack is going, but more in his hip and butt area than on his head. (Maybe it's because he's a lil bit of a butthead right now. Teenage hormones, you know. 🤭 )