Dave, I hate to hear that for you. I am aware that in some areas the quail have declined to where almost none exist. In that case I believe it is due to the lack of food for them. When I moved to Shreveport from W. Texas I brought 4 English pointers and 1 Golden lab. I contacted the Louisiana Parks and Wildlife and spoke with the local manager. He told me how to hunt quail here and said when he grew up here there were a lot of quail due to farmers growing soybeans, etc. But when farmers went to growing trees the numbers of coveys dropped. So maybe something like mesquite or some other plant has taken over and reduced their food.
