The California Gray was developed around 1940 by Professor James Dryden. The goal was a dual purpose breed that laid large white eggs, as that was what the market wanted at that time. The birds have a body type heavier than a Leghorn but not as "clunky" as a Rock. Unlike most of the white egg...
They do breed true they just arn't accepted by the APA. They are aoutosexing in the same way as the barred rocks. The male has 2 coppies of the barring gene the hen has1. However since they may carry recessive white, they can throw white sports. At one point barred rocks threw white sports...