There is a white egg gene in all Cortunix. It lays dormant in the early egg laying stages and "can" show up after a period of time. I have one out of 9 Quail females that just started laying solid white eggs. She is 2.5 years old now. I feed them crumble / greens / an assortment of seeds /...
Hens go broody when you don’t want them to… and won’t go broody when you do.