I'll take a stab (I'm against similar laws). It's more a moral and emotive argument than a "rational" one, but many people believe that taking a human life -- apart from certain cases like self defense -- is wrong, even if it's your own. The thinking is that it's too important to be something we should decide individually (and that it should be for nature, or God, to decide). There's also the aspect that suffering sometimes just happens, and we don't usually get to decide when and how it's going to happen to us. I believe humans are inherently different from animals (a philosophical or religious debate), so I believe it is okay to put your dog down.
My uncle recently died of Parkinson's and my aunt soon after of cancer. Both suffered immensely (especially my uncle), but they believed it wasn't up to them to end it. Both also had huge support from loving family and friends, the way it should be. I know it's easy to say here at a distance, but there's honour in a valiant fight to the end.
My uncle recently died of Parkinson's and my aunt soon after of cancer. Both suffered immensely (especially my uncle), but they believed it wasn't up to them to end it. Both also had huge support from loving family and friends, the way it should be. I know it's easy to say here at a distance, but there's honour in a valiant fight to the end.