I'm with Brian Pfleuger. No intentionally painful kills, but they are animals!
They can't fear death because they don't know what it is.
Projecting human emotions and fears onto animals is a foolish mistake.
Animals rarely die a peaceful death. There's no ICU for them. They usually die from an accident and becoming prey to a predator. Man is just a kinder predator.
Cogito, ergo armatum sum