I have the same problem... my male button quail is going bald. He has a female buddy, I feed them game bird feed, boiled eggs, calcium grit and an occasional branch of millet seed. He does seem healthy otherwise. Any suggestions or problems I should be watching for?
Why is my Button Quail goin bald?! - Page 4
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Maybe "he" is a "she" and vice versa? Or maybe you have an aggressive hen.
I really don't know; I haven't had mine that long, but the reason I said that is because the one I have that is going bald I thought was the male but it is the female. The other that I thought was a male is an agressive female. They aren't that old so it's hard to tell, and only one is laying and I can't figure out which one it is. There is also a male in there with them but I know what he is!