I like to fish. I hardly ever eat the fish I catch, so I release them. I feel the same way about hunting. When my freezer gets low on venison, I may take another deer in season. There is a big difference between responsible animal management and participating in a blood thirsty sport.
If animal numbers where low, it would be unwise to hunt something to extinction. If animal numbers are high, it would be unwise not to reduce the herd. All animals are going to die, I support proper animal management that is compassionate.
As far as applying this to humans, I do not support taking extra measures to keep someone alive after a certain point in their life, especially if they where in pain.
I feel the same way about myself as I do my dog. If he where to get hit by a car and was in extreme pain, which would be better, to take a half hour ride to the vet and put him down or end it right then and there?
Same for me, if I am in pain, don't keep me alive for months just because you can not bear the thought of losing me. Put me down.
I don't support these farm factories activities. They are not respecting the animals in life or death. There is nothing wrong in harvesting animals or humans for that matter if it is done properly.