Yeah. Leakage is often very attractive and comes in patterns.I agree with you. I think the birds pictured on the first page of this thread have leakage, not mottling. It’s MysteryChicken’s theory that a dominant mottling gene exists. I’m discussing the best way to test whether this is true or not, even though I personally don’t believe it, I’m open to experimentation.
Nevertheless, leakage is totally different from mottling.
There are no mottled birds in this pic. This is a pic of leakage!

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