What kinds of dog breeds are there?

There are currently a vast number of dog breeds in the world. They can roughly be classified by size into several categories such as toy dogs, small dogs, medium-sized dogs, medium-large dogs, and large dogs. In China, not many pet owners keep toy dogs. Although this type of dog is cute, their lifespan is generally not very long, and many have genes for congenital diseases. The most common representative breeds are Chihuahuas, Yorkshires, and Toy Poodles. The number of people keeping small dogs is relatively large. The representative breeds include the most common Poodles, West Highland White Terriers, Schnauzers, and Bichons. The number of people keeping medium-sized dogs is also relatively large. This type of dog has a moderate size, so it is more suitable for the needs of ordinary families. Dogs like English Bulldogs, French Bulldogs, and Corgis belong to the medium-sized category. Medium-large dogs refer to breeds like Shetland Sheepdogs and Shar Peis, which are larger in size but do not reach the size standard of large dogs. Large dogs refer to dogs with relatively large body sizes such as Alaskan Malamutes and Bernese Mountain Dogs.