Tibetan Mastiff - native strain of dog, which still exists in Tibet (though sparsely), and the English breed are very different in temperament. Elizabeth Schuler states, "The few individuals that remain in Tibet are ferocious and aggressive, unpredictable in their behavior, and very difficult to train. But the dogs bred by the English are obedient and attached to their masters." As a sheepdog and guard dog, The Tibetan Mastiff is ferocious in its ability to tackle even wolves and leopards. As a domestic dog, it requires at least a yard; it is not an appropriate dog for an apartment. Still, the modern English breed is generally easy-going although mildly aloof around strangers. Through hundreds of years as a guard dog, the breed has developed a tendency to bark at sounds during the night, so leaving it outside at night with nearby neighbors is not usually recommended. The Tibetan Mastiff is usually good with children in a family home.