Well not with that attitude they won't~
Please don't take this the wrong way, but... so you're saying you'd rather that the farmers protect their livestock and let predators starve to death? I'm not saying I've got this issue all figured out, but there are some realities. Those predators must eat. Predators don't attack livestock unless they must. If they don't eat those cattle, or horses, or other livestock, should they just starve to death? Just throwing the question out there for discussion but, wouldn't it be more humane to kill them?
I wonder somewhere in the distant future where we can synthetically and from non organ resources create all our food, would people start vegans as "plant killers"? Where does it stop?
Who gave you the right to determine what's OK to kill and what's not?
itt people realize that it's impossible to satisfy every moral guideline that they might have due to scarcity of resources