This isn't a question of what's natural, but what's moral -- they're not always the same.
I'm speaking of the Principle of Equal Consideration.
If we recognize self-interest in humans and the concomitant right to moral consideration, why do we not recognize the same in non-human animals? What qualities do we base our recognition of moral consideration on that apply uniquely to humans?
To be morally consistent we must either exclude some humans from moral consideration or include some non-humans. This is what my reference to hypocrisy referred to.
If it can reason with me, it is not on the menu. I have a policy of kill for survival, kill quickly and mercifully. I am very consistent with this as it applies to self defense with humans, too.
a) Kill only for survival. ( I have sat down and calculated this - it is cheaper for me )
b) Kill only those that can not or will not reason with me under necessary circumstances. I'm not equivocating an elk with an armed home invader, but neither are in the criteria for unreasonable to kill. Just as shooting an unarmed non-belligerent man down over an argument is not reasonable, even if he was unreasonable, it was just a spat ( no need - no kill). Hunting out of season and for no other previously mentioned purpose is unreasonable.
c) Kill quickly as possible. Speed is mercy.
So there it is. Some animals, some humans, some preferential, some deemed necessary. Even in the case where I choose not to kill to eat cats and dogs is no different than a guy choosing who he hangs out with tonight.
It's really no different than a
bear mentality, humans are not typically on the menu. It is a well noted preference. They only attack for perceived territorial violations or if threatened. Occasionally they have killed humans for food but then only out of desperation. Yet, it is a proficient predator as well as a scavenger and omnivorous. I do not think there is any thing special that separates us from animals making us a higher species. Often some of the people who hunt/kill animals and those who refrain believe we are separate from animals, we are either higher up the moral,evolutionary,spiritual ladder or some likewise excuse. We are animals.