Should I throw out my entire frozen mouse stock and buy new due to situation?

[Bogertophis]

As long as the prey stayed below 40° it's safe. The "danger zone" for food is 40°-140°.
So if the prey stayed below 40° there's no risk of bacterial growth....

Not to split hairs, but there is still risk of bacterial growth at 40*. That's the temperature our refrigerators are normally kept at, & food surely does still spoil...it just
takes more time.

It was hard to advise Rodop about his thawed mice since we weren't there, much less getting temp. readings as to how cold they really were.

And btw, I like the idea of the test bottle of water with a coin being kept in the freezer, even for our own food.