Aren't wild populations of bobwhites in trouble almost everywhere. They certainly are here in Michigan. Our DNR came out with a report a few years ago that said Michigan's quail population had declined by as much as 90% in some regions, IIRC. I think it blamed predation from feral cats and native predators, habitat loss, and possibly disease spread by domestic poultry.
At least as a species it will survive, because it is easily raised in captivity. But in the wild things look bad.
They were common here when I was a kid in the 1960's and 1970's. I haven't seen or heard one in probably 20 years now.
It seems to me this would be a good species to try to reestablish through raise and release programs, but I guess if the habitat issues and predator issues aren't resolved, there isn't much of a point.