We have been raising coturnix quail since 2018. We have to have a license to have other types of quail here in the US. We have never got one coturnix to sit on eggs. We use an incubator to hatch all of ours. They lay lots of eggs from about 8 weeks old until about 6 months old. They lay more eggs if they have good lighting. They don't lay well below 32 deg. F. We use five males to one female ratio for best breeding. Ours grow and produce well off of 16 percent layer mash made at our local mill. They seem to be extremely healthy and disease resistant. They are easily killed by small critters. If they can stick their head out of a pen, they will let a cat chew it off. They can live in small spaces. They need extra protection at all times because they are tiny and fragile. They are pleasant to listen to. Their breast meat is delicious if wrapped in bacon and grilled. Overall, they have been a joy to raise.