The question I am asking is whether the classic euthanasia of cats at shelters and in veterinary clinics by the use of sodium pentobarbital is painless or not. There is an assumption that it is painless and that the cat simply falls asleep and dies. But there appears to be evidence that the lungs fill with liquid causing distress and pain a bit like waterboarding torture. Please click on the link above the image to read the full article.
