I just talked with a cat who died last week. This cat said that the body is amazingly tenacious. She was commenting on the pain and suffering that we so often have to go through at the end. She said, "Well what do you expect? To have a body that will stay strong through all of the attacks and tempests life brings means that it will be strong in trying to stay alive at the end. It is the price we pay. Fortunately after you finally die it is easy to forget the pain and just relax again. EVERYONE has to go through it. It is part of the deal of being born. Oh well!" She never expected euthanasia and couldn't imagine blaming her person for not having a Doc at hand at 3:00 AM.
She was pretty philosophical. Her last hours were rough, according to her person. It was an interesting lesson!