The Tibetan mastiff is one of the world's biggest and deadliest dogs, known for its imposing size and fierce loyalty. But did you know that this ancient breed also holds some surprising secrets? This ancient breed possesses remarkable abilities to adapt to high altitudes thanks to their origins in the Himalayan mountains. Tibetan mastiffs have larger lungs and hearts than most breeds, allowing them to thrive in environments with less oxygen. And while these dogs are known for their fierce nature, they also possess a unique genetic mutation that makes them more social and affectionate towards their owners. Did you know that the largest recorded Tibetan mastiff weighed around 180 pounds and stood around 3 feet tall at the shoulder? Tibetan mastiffs are more than just imposing guard dogs. They are examples of nature's adaptability and genetic diversity.