I don't want to be in the religious conflict or whatever, I would personally contact DNR and tell them the devastating situation, if they say to let it be, then make YOUR OWN PERSONAL CHOICE, everyone in here would do something different, it all depends on what kind of person YOU are. I can tell that you want to take this animal to stop its suffering, I would do the deed and go on with life and not pay attention to the critiques that you will get, everyone critisizes others, you have to be your own person, do what YOU want, we are only human, do what you feel.