RE: Not a PETA Question!
This is one of the reasons that I practice as much as I do and make sure all of my equipment is in top working order. I also wait for the best possible shot, that I know I can make.When I shoot an animal, I want the quickest kill possible.
It hasn't always worked out that way. But more times than not, it has been a quick humane kill.
It is out of respect for the animal. Another reason I like to take good respectable pictures after the kill.