28. Nepalese Mastiff

A huge dog, the Tibetan Mastiff is The color of its medium-to-long double coat changes with the temperature. This large, alert dog, which weighs between 90 and 150 pounds, is a fierce protector of its family. The American Kennel Club refers to this breed as the “Guardian Dog Supreme” because of its tranquility inside the home and intense territoriality outside. Tibetan Mastiffs, once the Himalayan guard dogs, are independent and assertive. They brazenly use their 24- to 26-inch size to their advantage when confronted with someone they view as a threat. This hound’s baritone bark, intimidating weight, and amazing agility will deter intruders.