That's an interesting sentiment. Now this is over the interwebs, and I really mean no offense, I'm just asking questions. I wanted to get that out front since its easy to misunderstand intent with forum comments. But do you see the ethical question differently when shooting at a running deer vs. a running coyote or jackrabbit? Aren't you as likely to would a coyote or jackrabbit as a deer? Would the distinction be because one is a "game animal", one is a predator, and the other is a "varmint"? I haven't thought about it before this, but I think I would personally have trouble practicing on a living animal. Not sure how I would go about getting experience with moving targets otherwise, though.