What about the drivers?
Why is the cow taking all the flak for this? What about the numpties driving without due care and attention? It's not like you could easily miss seeing a 5ft high beast of burden (assuming you've got a roadworthy vehicle) - it sounds like the truck driver was carrying numerous people in the back of the pick-up, definitely not a good place to be if the wagon comes to an abrupt halt.
As cows are generally unaware of the rules of the road (such as may exist in Cambodia), it's a bit harsh blaming her for causing these deaths. Unless, of course, she is charging at road-users from the side? Or perhaps recreating in real life a scene from "Horace Goes Skiing"? (http://en.wikipedia.org/wiki/Hungry_Horace#Horace_Goes_Skiing for the uninitiated)