Neonatal rodents do not have a resistance to hypoxia and I don't know where you have heard that baloney before. I have CO2'd them as well as used canned air, and they go to sleep extremely fast. Yes, they may still be able to breathe while being partially sat on by their mother, but babies can definitely suffocate if oxygen deprivation occurs.

I used to feed p/k and f/t mice/rats to my snakes(still do with the Ratsnake occasionally and with the cornsnakes), but putting the mouse in a pillowcase doesn't mean a quick death. I have had some mice that didn't die after the first whack, and it just isn't fair to the rodent to have to whack it 2-3 more times. It would be like a car that slammed up against a brick wall and you didn't have your seatbelt on. You may still be alive with internal injuries, brain damage, lung collapse, diaphragmatic hernias, etc. You may not die for a few hours. Sounds like a great death to me...

I prefer using CO2 or canned air found at Walmart. I have also put them to sleep using Isofluorane and Euthasol, but not everyone has that just laying around like I do

You can also make a mixture of baking soda and vinegar, makes carbon dioxide, and works just the same(a bit messy though).

I think we need to have a bit more respect for the rodents that feed and keep our snakes healthy and happy. If you choose to feed live, please do it correctly and if you feed p/k or f/t, I say the exact same thing. Do it right! The snakes seem to do a much better job of dispatching rodents, so why not feed live instead of you not killing a rat or mouse on the first blow and they suffer for it?

*teps off soapbox*