Because of our liberal environment on earth we are being told now that it is murder to kill animals. This thinking comes out of evolution, that we are nothing more than animals and if we kill another of our own kind it is murder whether it be man or beast.
This is silly, God clearly says that a wise man takes good care of his animals. However He also tells us that the beasts are for us to eat.
Proverbs 12:10 "A righteous man has regard for the life of his animal, But even the compassion of the wicked is cruel."
It is foolish and wasteful to kill animals simply for sport or trophies, but it is not murder.
Genesis 9:3
"Every moving thing that lives shall be food for you. And as I gave you the green plants, I give you everything."