I'm going to assume you are neither roasting nor freezing them, so I say feed 'em. It won't hurt anything. I feed all new arrivals on whatever day feeding day is here, unless they were literally just unpacked.

I think getting fed could ease anxiety over being in a new place. But I've never had any reptiles go into hiding for days after arrival either. You put something in an enclosed box, it's natural instinct is to find a way out.

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