I will tell you that CO2 euthanasia is generally considered a humane method, although in research they tell us that and then also don’t allow its use on anything bigger than a pre-adolescent rat.
I do not like this method, and have always thought it was really weird that it was considered acceptable. Seems like N2 or CO would be much better choices, and aren’t more expensive. But generally CO2 is accepted by animal ethics boards.
I will tell you that CO2 euthanasia is generally considered a humane method, although in research they tell us that and then also don’t allow its use on anything bigger than a pre-adolescent rat.
I do not like this method, and have always thought it was really weird that it was considered acceptable. Seems like N2 or CO would be much better choices, and aren’t more expensive. But generally CO2 is accepted by animal ethics boards.