Story of my life. I know how much it hurts. I feed about 15 strays, and when one doesn't come for a few days, I'm worried sick, accusing neighbors, wandering around the neighborhood looking and calling (I've given them all names and they're used to hearing me say their names). In my personal case, I almost always find them just simply eating at another caregiver's station.
There was a cat that would especially drive me nuts with the disappearing acts. One day I had enough: I brought a carrier downstairs with me at their feeding time, trapped her and now I always know where she is - snoozing on my bed, scolding Prince for coming into HER bedroom, or eating her all-time favorite food: canned pate. I solved MY problem, but she hasn't ever complained!
The Royal von Meouw Dynasty: His Royal Highness the late Prince von Meouw,
Her Royal Highness Princess Gatita von Meouw, Nikita Duchess of Meouw and
His Highness Cuchi-Cuchi, next in line for the throne of Prince von Meouw.