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Anonymous
I know of the "humane" way of euthanizing lab mice is to take a metal cage card (or a thick metal plate the size of a note card with rounded sides,) place it behind the skull, with mouse on a flat surface, push firmly with the cage card without crushing the neck and to pull on the tail, until the neck bones snap. You'll know it when you hear it and feel it.
CO2 also works, but not the kind that comes from dry ice or a fire extinguisher. I read that in a list, and I can assume that someone has used a fire extinguisher.
You could also use a bolt to the brain, but that's not necessary. Mice aren't considered as animals by the USDA and are not covered by the Animal Welfare Act.
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