Good eye; I completely missed the feathering on the legs of the red bird. Now that I've seen them, I agree that it's a mixed breed.
What breed are these girls? - Page 2
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Thanks for the help with identifying the wyandottes. The small red hen does indeed have feathered legs, and all my searches through breed images have come up with nothing that looks like her, so you are probably right that she is a mix. She is great layer and a very savvy little hen.