The dingoes were eating babies - lambs, that is. And grown sheep, as well. Being that Australia, as they say, rides on the back of the sheep, dingoes ravaging the population just wasn't acceptable. So in the late 1800s the Aussies built a fence to stretch across the country, thereby relegating the dogs to the upper two-thirds of the land. The Dingo Fence still stands guard over the sheep today, and is maintained on a constant basis by weekly truck patrols.