Cecil, know the feeling. When I hunted seriously it was almost always a concern of mortally wounding an animal that didn't get recovered and used and it happened. However, unlike greedy self centered humans Ma nature is most efficient. When an animal/mammal/fish is killed, somehow, somewhere down the line EVERY molecule of that being is used in a positive manner. As long as something is harvested (killed) in an accidental or well intentioned manner and not utilized by the predator there should be no guilt or self admonishment.