I figured you meant to say she'd just eaten 36 hours prior..."typing while asleep"
I believe you can get the chemical heat packs from Ship Your Reptiles, & they'll be safer for snake-use than the ones sold as handwarmers for camping & sports & such, or so I'm told.
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To be clear, I'm not sure what the difference is: in an emergency I'd use either one but when snakes are shipped, apparently the 'handwarmers' for human use get too hot. So they're similar products, but if you have time to buy them ahead of time, it's probably best to get the kind used for snake-shipping. Me, I use jars of hot water anyway, though I have handwarmers on hand too- they might be for me!![]()