Put litter box, canned food and articles of your worn clothing on the porch or near the door. Tell in person as many neighbors as possible to be on the lookout and ask them to check their garages, sheds and window wells. Both day and night check under bushes and porches and look up into pine trees. At night with a flashlight walk the neighborhood shaking a box of dry food or treats. Put a blanket out on the porch for her to curl up on in case she returns while you are sleeping. Once in a while warm the canned food in the microwave and put out a bowl of water. Can also put some catnip out with your worn clothing.