Mike, I wish you luck with re-introducing quail on your property, and wonder how well you'll do. I, too, have heard and read about the number of birds killed by cats, and of course quail nest on the ground. But even if you have no cats, you may have another problem. I've heard that the main reason we have almost no quail at all anymore is that the fire ants have wiped them out. I don't know for sure, but would assume that you have fire ants.