Pugs were originally the pets of Buddhist monks in Tibet. The Scottish Terriers are one of the oldest kinds of terriers. An Austrian Cattle dog was recorded to have a life of 29 years and 5 months. That is a very long life for a dog. The Chihuahua is the smallest dog breed.
Toy dogs are usually small.
The St. Bernard might look small when it is a puppy. St. Bernards grow up to be one of the biggest dogs in the world. The Mexican Hairless has no fur on its body except for a few hairs on the top of its head. The Chinese Shar-pei has very loose skin. The wrinkles sometimes fold over its eyes.