That's a bit anthropomorphic. I have a hard time going more than a few days without food as a human. It's a completely different story with (most) reptiles.
I track my snakes' and turtles' weight with every feeding, and find the weight loss negligible even over extended periods of times (not including hibernation when it's expected)--my garter snake has refused food for over 3 months now and STILL weighs almost twice as much as he did when he came out of brumation.
Granted, this doesn't necessarily translate to gecko nutrition, but 10 days is not going to adversely affect this guy's geckos unless they're ill to begin with. I haven't started tracking the weight of my banded geckos yet as my scale won't register such small payloads, but I got them from a guy who had procured them as feeders and after various delays in meeting up, it had been at least a month since they'd eaten, perhaps 2. A couple of weeks' worth of spiders and crickets and they're good as new.
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Chris McMartin
www.mcmartinville.com
I'm Not a Herpetologist, but I Play One on the Internet