This sign doesnt seem to odd except for the fact that it is on a gate at Moarto Zoo (an open range zoo in South Australia where you drive through exhibits on a bus) on a gate going into the Lions cage (the lions are not tamed). Also the tripple gate system sits between the Painted Dogs (also not tamed) and the Lions. There is no way to get to that gate with out going through either the Lions or the Painted Dogs.