A massive dose of sedatives makes you just as dead, but makes for an awkward ceremony seeing it can take awhile.
It doesn't take a while at all. I've put down a lot of animals with an overdose of pentobarbitone, and they literally fall off the end of the needle. We're talking a couple of seconds.
Sometimes the animal gives a little gasp or a sigh, that's all.
What seems to have happened is that some idiot looked at the method used to
anaesthetise human patients, which is designed to depress respiration and so on as little as possible and keep them only
just unconscious, while using a muscle relaxant to prevent movement which might interfere with the surgical field, and decided to base the execution method on that, rather than on the sensible barbiturate-only method.
It almost seems as if there was an element of, well these people are people, so we should treat them as people not as animals. The trouble is, the method chosen wasn't suitable for euthanasia. Now it's SOP though, the inclusion of the muscle relaxant is seen as a good thing because it prevents the little gasp or sigh or a few involuntary muscle twitches. This appears to make the onlookers feel better about it all, and never mind if the person being killed is paralysed but fully conscious, and suffocating to death while having fire injected into their veins.
Disgusting. Inhumane. I literally couldn't believe it when I first found out what was meant by "lethal injection" in the US penal system. If a vet put an animal down in that way, they'd be struck off for causing unnecessary suffering.
Rolfe.