[bert]

There is no evidence and it is absolutely impossible to probe there is any pain at all

[exDemMom]

It is possible to do veterinary studies to look at brain activity during euthanization and determine if the animal feels pain in the process.

I read one such study done on turkeys during the slaughter process. I think that similar studies would have had to be performed before the FDA would approve the euthanization drugs.

[libstripper]

My only evidence, one way or another, is five or six general anesthesia operations I’ve had in the last 40 or so years. No pain each time and just like riding a time machine.