Art Eatman said:
I do not know how one studies such things as how animals perceive pain. But apparently studying the nervous system of an animal by biologists allows certain conclusions.
Art,
Frankly, I don't know how to scientifically measure such things either. I think it is also fair to say that any studies on that subject would need to be examined for potential bias (ie: was it conducted by PETA? A hunting group? A neutral third party with no sign of an agenda?).
I'll say that my experience on this subject is based purely on my observations alone. By way of one quick example, last year I took my dog backcountry skiing with me near the Continental Divide (we do this regularly).
On the way back to the car my pup tripped into a small hole and sprained her shoulder, or something to that effect. Let me tell you this, anyone within 100 yards of my house that night would have had NO DOUBT that my dog was experiencing excruciating pain every time she attempted to stand on that leg. The screams she let out would almost make your stomach turn, and the look in her eyes was one that revealed pain and trauma!
It is my (totally unscientific) belief that animals often experience pain in ways that are physically very similar to us, but that they hide the obvious signs of such distress for the sake of survival. In essence, I believe they may be more prone to "sucking it up" when the chips are down.
It also seems that prey animals are more likely to hide any signs of distress until they can no longer do so. I've experienced this with the numerous prey-species pets that have been kept around my home over the years... with my pets I've found that a dog, cat, or ferret will let you know when its health is declining, whereas the pet rabbit or hamster typically seems to just get sick and die within the very same afternoon.
In fact, to muddy the waters by contradicting my own view, perhaps this even means that the advanced brain of a predatory species (cat, dog, ferret) is more able to experience pain when compared with the more primitive brain of the grazing species (rabbit, ferret... deer)?
Due to my profession I've also had the unfortunate pleasure of seeing dozens of people with life threatening wounds over the years. Some of these people have lived and made a full recovery, some have died, and some have survived with crippling injuries. Nevertheless, I've seen victims in each of those categories who were screaming and crying in pain, and I've also seen victims in each of those categories who were as calm as could be. The calmness that some of the victims showed was almost eerie, to the point of making you believe that they were feeling no pain whatsoever.
I once had a guy (who wasn't drunk or high) walk up to me when I was responding to a shooting call. I thought this person was coming to me as a witness, until he revealed that he had sustained a serious gut shot from a .45 caliber. Then he asked me, calm as could be, "hey, do you think I need to get this looked at?"... Yeah, you do, sport.
So, maybe all animals don't feel pain the same way. But, it appears that humans don't, either. Regardless, killing has been a part of the natural world since the dawn of time, and animals such as our own species have long survived from the flesh of other less fortunate species. The life of a predator can be outwardly seen as a life of power and domination, but it is also a complicated life that has its own set of shortcomings.
I don't believe that killing by arrow or bullet typically takes place with no pain, but I also don't believe that we are necessarily behaving in a "cruel" manner by doing what a predator does, especially in the comparatively efficient ways that we do it! It is still my hope that my bullet will be placed accurately, and deliver death in a swift manner, with minimal suffering. I have a great deal of respect for animals, but I also have a great deal of respect for the natural order of things in this world.