Thawing in cool water is way faster than in fridge (or room air) & doesn't give time for spoilage...just saying. And no matter how you thaw, be sure to manually feel the
thickest part of rodents with your fingers to make SURE they are fully-thawed. Rats especially can take a long time to fully thaw, because their thick fur is good insulation even in death. A rodent with a cold body core will either be rejected or may be barfed back up...neither is a good option.
Nutribac: while usually accepted when dusted on damp rodents by strong feeding snakes, your best bet is to use something to pry open the dead rodent's mouth & install* the Nutribac there, then push the mouth closed: this way your snake won't notice and when it's dusted on, much of it falls off anyway while the snake is swallowing. (*I've found that using a tiny measuring spoon makes this easier. Don't worry about measuring it, what fits in the mouth is fine.)
I don't want you to screw it up either.![]()