One more suggestion after you come back -- you're probably already gone looking right now. I know you're deaf, so ask your landlord to come into your apt. (or is your roommate/friend hearing?) and you call for Shadow and see if he hears any meowing anywhere nearby. This worked for me once when we could not find Rascal many years ago, she had gotten into a rafter where we couldn't see her (or hear her meowing.) I hope this helps !! Prayers and HUS !!