Any suggestions?
We have left his cage open, but he has not returned. We have also left a pile of bedding and food in the kitchen but it's not been touched.
He got out about 10pm last night but we didn't notice when it happened, just saw the ball a little later and the lid was off. Can see no trace of him at all. There are plenty of hiding places, including where he can get under the floor. Have we lost him for good? 
Has anyone got any success stories for recapturing hamsters? How long is he likely to last on his own? Worried about access to water. Have not told DD yet, gulp.