ORIGINAL: RockSteady
Would only ever head shoot a rabbit with a bow all other game should be through the heart / lungs with a razor sharp BH. As for rifles I mostly only do head shots on all game I take with a rifle. In AustraliaI believe our pro roo shooters have to pass tests to prove they can hit the Bull 5 out 5 to ensure only clean head shots are taken before they receive their license.
When hunting or culling with whatever weapon I use I take the shot that will result in the cleanest fastest death for the animals being harvested. The trick is to shoot only when you are 100% confident in a clean harvest and not to succumb to the pressure of taking the shot to early for the sake of getting some trophy.