The neighbor in the back was taking his mail out to the mail box and wrang my doorbell (at 5:45am!) to tell me he thought she was under his car. Sure enough, there she was. Now we've got tears of joy. She seems to be physically ok but a little out of sorts. She's drinking a lot of water but hasn't eaten anything yet. Because of her age (20), I'm going to take her to the vet just to make sure.
Thanks again for all your kind words, thoughts and prayers.
John