The pit bull originated in the United States in the 19th century and is a descendant of Stafford and Bulldog mating. Also known as American Bitdog or American Bulldog. The Bitdog is a breed of dog that has been bred to possess endurance, strong biting power, tough skin, and well-developed muscles. These characteristics make up its powerful 'protective armor', which is used to fight against other dogs and is therefore used in dogfighting. Due to its extreme aggressiveness, some countries have enacted laws restricting the breeding of pit bulls, and even explicitly prohibiting the keeping of pit bulls.

The Malinois dog is originally from Belgium. Bold and fierce, strong attacking power, high alertness, strong search reflex, excited about objects, and strong desire to retrieve; Good obedience, loyal master, good physical fitness, fast running, and long-lasting endurance. The Linua dog is mainly raised near the city of Marinos, hence its name. The Marinua dog has strong working abilities and is suitable as a guard dog for factories and courtyards. However, due to its strong attacking power, large size, and loud barking sound, it is not suitable for being kept as a family pet dog. The Malinois dog is favored by police and military forces around the world and can be used for tracking, drug control, surveillance, guarding, escorting, and other tasks.