I would weigh him right now since he just ate. Then post his weight on here and people could probably tell you if that is a healthy weight for his age and sex. As was mentioned these guys are known to fast. I haven't had it happen yet but I'm NOT looking forward to it. Then attempt his usual feeding schedule using the tricks mentioned. If he doesn't eat, then weigh him instead and post his weight. Just like Gale said about fasting yet only losing 10 percent (which could still be a lot depending on the snake). If your snake starts to drop off weight then I'd switch to live. Just post updates now and then and I'm sure help will be offered when needed. That sucks about all that wasted food but as long as he is healthy that is the most important thing. That's exactly how I would approach this situation but with some added behind the scenes stressing and frustration.