Do they bite?
I remember renting a car in Baja Mexico, they told me to minimize driving at night. Since many pastures were unfenced, some cows like to wander onto the road which is one way to become hamburger (or dead meat) on a grill (Nissan compact car grill that is). Thankfully I didn't hit any cows on the road, because I did drive one night.
Back at home, a cow did escape 2 blocks away from my neighborhood, but it was mellow and didn't wander far from home. I guess I live in a somewhat rural area too, even if I don't own a tractor, heck I don't even have a lawnmower.