she looks a lot like a leghorn cross we had. This bird was a cross with a white leghorn and a game rooster that was mostly black. White is dominant in leghorns so you only need it from one side of the cross, but when you just have one gene for white other stuff starts to creep in. However look closely at her earlobes. Leghorns have white ears and even in crosses you should see some white mixed with red. I looked up California white and they have red ear lobes. You can if you look closely that this leghorn cross still has mostly white ear lobes. (BTW those aren't her chicks, she just served as brood mother for other hens eggs)
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