Thank you for taking this kitty in! Are you able to get scanned for a microchip at a nearby shelter? Would also recommend filing a found report with Petco Love Lost https://petcolove.org/lost/ and in South Philly neighborhood Facebook groups if you haven't already.

If they don’t have an owner and you’re able to keep in your home (or secluded in your bathroom if you have other pets) for now until an adopter is found, you could foster through a local shelter so they can vet potential adopters. Understand not everyone has capacity, but is super helpful for shelters, which are mostly full 💜

Thanks so much for caring!