From a sport - hunting perspective, the lives of all game animals revolve around two criteria- a central nervous system consisting of the brain and spinal cord and the oxygen supply that fuels it.
In order to kill any game animal quickly and humanely, one mist "switch off" the brain, sever the forward half of the spinal cord, or disrupt the system's oxygen supply. The first two options are pretty straightforward; a shot that reaches the brain will switch it off, and a neck or shoulder spinal shot will accomplish the second. The third, disrupting the central nervous system's oxygen supply, is a bit more complex.
By Carolina Armero.