Explain the consequences of driving carelessly or hitting animals while driving.
If you've mowed down that many deer and other creatures then may I suggest that driving a truck isn't such a good thing. I've been driving for many a year and have yet to hit one even though I've lived in deer country for extended periods of time. I can usually avoid them but then in a sloth turning vehicle like a F350 I suspect that avoiding things isn't the easiest.  It's either that or you a crappy driver.