Euthanasia....................… humane?

I have heard the same thing. I can't really give a reference or research on it at this second. But if you ever read Temple Grandin's books, she talks about euthanasia a pretty fair amount. She designs stuff (especially for cattle) to make slaughter humane. I've read "Thinking in Pictures", "Animals in Translation" (loooved that one) and she also has one called "Animals Make us Human." You could probably learn from those books. I got this book called "Thanking the Monkey" that's about animal rights but I haven't read it yet, so I don't know if there's a section on euthanasia.