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)