You could try closing any doors off in the room he was in and sprinkle flour on the floor to see tracks. This is how I found one of my escapees. Also try lifting up any couches they sometimes like to curl up in the springs. Generally my escapees haven't gone too far. I've had 2 escape in 6 years. And I've found them rather close to their cages squished into something. I hope you find your cinny good luck!