Tigger came home this evening! My guess is that someone had him in their house because he seems calm and not starving - although he did hit me up for a treat. I'm going to try to spread the word that it's worth getting a cat checked for a microchip at a vet's office or the local Humane Society. They'll do it for free. I always keep our cats' microchip information up to date. Our youngest two cats were definitely abandoned when someone moved out of a rental house in our neighborhood. Still, I had them checked for microchips in case they'd gotten lost in the move and their owners were looking for them. I also listed them with our wonderful local Humane Society in case they got a call about a cat missing the description of one of the abandoned cats. Now, they've been part of our family for three years.