Kudu bull fight - Pain
A pair of young Kudu bulls start following through on instinctual dominant rights. Although these youngsters have no real incentive to fight, they know, instinctively, it is time to show power and dominance.
In this photo the bull on the right gets a blow under the eye, obviously hurting. And so nature evolves and runs. All Natural.
The Greater Kudu is a woodland antelope found throughout eastern and southern Africa. Despite occupying such widespread territory, they are sparsely populated in most areas, due to a declining habitat, deforestation and hunting.