I suspect this shooter was unaware that cows are approximately 1,000 times easier to move wilst alive.
http://www.youtube.com/watch?v=S7kTNpllJYoApparently this procedure is becoming quite fashionable among the enforcer set:
https://www.google.com/#q=police+shoot+cowAll the sugary snacks, steroids, and constant Homeland Security Alerts do tend to make one desire a bit of excitement.