Best way to pre-kill?

[satomi325]

I'm going to cut and paste my post from the DIY forum, since I appear to be the only one here who's actually had intentionally induced hypoxia in a controlled environment and knows what it feels like to have CO2 build up in my blood...



I'm going to skip over all the debate and add in a minor detail that I think may be relevant as far as CO2 goes. As military aircrew you have to do altitude chamber training regularly, most depressurization events are slow leaks (the kind you see in the movies is super rare) so it is essential to know (and be reminded at regular intervals) what hypoxia actually feels like so you can recognize it and respond appropriately. I'm assuming not many people have here have first-hand knowledge of what it feels like to actually be hypoxic.

Losing oxygen fast (we did practice that too) is pretty scary, you can feel your lungs straining and it is alarming. Slow leaks however are kind of fun. Everything in your brain slows down, things seem amusing for no reason. Your reactions slow dramatically, but it isn't alarming, more of an intriguing event that you somehow can't process. Eventually the fog gets thicker and thicker and you black out (or put your ox mask on and suddenly realize you were seeing in black and white only and didn't even notice).

I have no reason to think that rodents experience hypoxia any differently than humans, we're mammals with very similar biological processes. Thus I believe that CO2 is a humane method as long as it is done gradually. Just control the flow, however you chose to do it.

I agree with you and you are 100% correct. And disagree with Mephibosheth1.
The most humane Co2 administration is to go slow. Once they pass out, do a rapid release to euthanize.
Pre-charged or quick release of Co2 from the start is inhumane and causes the animals to panic/stress more. Suffocation while conscious is painful. Suffocation while unconscious is not.