Quail is pretty likely but you're also likely to see some buff columbian genetics. Either partial or in full. I hatched one full buff columbian and two buff columbian quail mixes. Blue, genetically, is one of those simple punnett square genetics that's dominant, so if you have a blue quail hen and a quail rooster, half her babies will be blue quail and half her babies will be standard quail. I have one blue quail hen, so if I'm diligent about tracking her eggs, I can assume half her offspring from Agate will be blue.
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