I use Layne Labs and on their website it says that all of their mice are flash frozen. I honestly don't see how it matters for pinkies, since as stated previously they can't thermoregulate etc. I live in eastern Montana where winter temps frequently get below -40. I can tell you from experience, after a very short while exposed to that kind of cold, you can't feel ANYTHING. The burn comes later, when you're trying to de-ice yourself. : )
-- Kai
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