First time I learned to hunt, I cried when I killed a deer. But my father told me, "we do this so we can eat, the animal did not suffer, and this meat will last us quite a while."
Growing up very poor on a farm gives you a good understanding of where your food comes from.
I learned how to gut a chook at about 4 or 5 years of age. No qualms here :D The 25th century is more than a bit different about it all.
A quick, clean kill is far more merciful than a slow and lingering death.