 not enter in that legal dispute of whether it's okay to put a pet to sleep or not. But it is something, and people have many different beliefs of it. Some people don't believe in euthanasia. Some people will only use it as a last resort when there's obvious suffering. And some people are going to do it before things get too bad so they don't have those feelings of regret to see their pet get sick at a later time. Daniel Promislo at the University of Washington. What kinds of ethical conversations come up when talking about something like prolonging a dog's life?