Dogs are domesticated mammals and are one of the most popular pets worldwide. Scientifically known as Canis lupus familiaris, dogs are descendants of wolves and were among the first animals to be domesticated by humans thousands of years ago. Over time, humans have bred dogs for various purposes, such as hunting, guarding, herding, and companionship. As a result, there are hundreds of different breeds, each with unique physical traits, temperaments, and energy levels.。
The Bulldog is a British breed of dog of mastiff type. It may also be known as the English Bulldog or British Bulldog. It is a stocky, muscular dog of medium size, with a large head, thick folds of skin around the face and shoulders and a relatively flat face with a protruding lower jaw. Selective breeding for appearance has led to increased susceptibility to health problems including brachycephaly, hip dysplasia, heat sensitivity and skin infections.）
The Pug is a breed of dog with the physically distinctive features of a wrinkly, short-muzzled face, and curled tail. An ancient breed, with roots dating back to 400 B.C., they have a fine, glossy coat that comes in a variety of colors, most often fawn or black, and a compact, square body with well developed and thick muscles all over the body.）
The Labrador Retriever, also known simply as the Labrador or Lab, is a British breed of retriever gun dog. It was developed in the United Kingdom from St. John's water dogs imported from the colony of Newfoundland, and was named after the Labrador region of that colony. It is among the most commonly kept dogs in several countries, particularly in the Western world. Labradors are often friendly, energetic, and playful.）
The American Bully is a modern breed of dog that was developed as a companion dog, and originally standardized and recognized as a breed in 2004 by the American Bully Kennel Club. Their published breed standard describes the dog as giving the "impression of great strength for its size". The majority of major international kennel clubs do not recognize the American Bully as a separate breed, including the UK Kennel Club, the American Kennel Club, and the International Canine Federation. Sent 1m）