Earlier quoted context omitted.
My daughter got an internship at a research lab this summer - where they have thousands and thousands of research mice and they kill several mice every day. She said CO2 works on adults and therefore that's what they use. But CO2 doesn't work on baby mice and is considered inhumane. Instead they use scissors and cut off the baby mice's heads. It's to be done swiftly so it's like a guillotine. The labs are continually…
> they use scissors and cut off the baby mice's heads. It's to be done swiftly so it's like a guillotine. Yes, that sounds fine. Much more humane. Carry on. As long as the ethics committee OKs it.
As to possible alternative methods, those include freezing, which could be quite prolonged and painful, and blunt force trauma, which could be difficult/ambiguous to perform correctly and confirm correctness every time.