Were they sold to you as girls? I don't have any experience with them personally. I did find a pdf and
a post that discusses them. You might even give a try posting directly into that thread and see what they think. Here's the picture of the chicks from the PDF but I don't see the bright white head spot on yours, but I don't really see a distinct eye-liner or chipmunk pattern on any of them either to say with confidence either way. If they were sold to you as girls, not having a defined head spot would be a good sign.
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