Seeking high and low

Still searching for Z, without much luck. It's now been 3 nights and still not a peep. I keep imagining I hear him creeping up the stairs to slink under the bed, or barking outside at some ragged ol' puss. But it ain't him. I keep looking at his bowl of food with a few scraps still left from his last meal and his leash hanging up in the entrance and it hurts...