If he had it in for 24 hours - wait the full two weeks.
It also wouldn't hurt to pick up some of this:
http://www.drsfostersmith.com/produc...22&pcatid=6422
Petco carries it. Get the powdered version and sprinkle some on the prey item right before you feed it.
I can't tell you it works - but I can tell you that I've never had an issue with a secondary regurge while using it.