This same debate has come up a number of times. The facts are obscured. Nobel gases will work but are not as effective as C02. Nikki posted studies to that effect. Nitrous oxide is not correct, isoflurane vs C02 is the actually debate. It is nitrous with out adding oxygen, oxygen addition is not lethal quickly. Yes there is a debate, yes there has been questions about the which is more humane. I believe an open mind and attention must be paid to such matters. The best choice (humanly speaking) seems to be currently isoflurane gas.) Is c02 bad no it is not it would be the second choice at this point. The issues with Isoflurane are many cost being high on the list, enough gas for a shoe box killing chamber is about 50$ US, it requires permits to buy, the delivery system for it is very costly as it is lab grade (about 4000$ a unit) and it is not available off the shelf to purchase.
There are debates the lab animal community the consensus ends in this simple statement,
"I suspect we shouldn’t be using carbon dioxide, but we don’t know what’s substantially better.”
Dr. D Weary UBC
Kurtilein when you buy your own isoflurane set up, and start reading the studies rather than wikipedia and PETA, please let it be. The debate is not nobel gases vs c02 it is a single very specific complex gas that requires a huge uphill battle and no clear and obvious out come at this junction. There is already enough fear mongering and decisions based on sources with no grounding in fact happening adding to it is not going to help anyone at all.
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