Why do I feel bad about killing a mouse?

[Rynjin]

Killing another living thing is inherently pretty disturbing if you think about it, is why. It was alive and now it's been snuffed out just like that; just like you will be one day. It's a reminder of your own mortality and everybody else'. It doesn't stop people from doing it, and you can desensitize yourself over time, but it's ever really going to feel right. It's part of the reason I stopped going hunting.