Dogs range in height from 5 to 34 inches (12.7 to 86.4 cm) at the top of the shoulder blades. The smallest breed, the Chihuahua, weighs two to six pounds (0.9 to 2.7 kg); the largest breed, the mastiff, weighs up to 220 pounds (100 kg). Most dogs are born with a fairly long tail; the tail may be docked (cut) for appearance or cleanliness. The ears may be short or long, erect or hanging. In some breeds, the ears are cropped (cut) for appearance.
1 year old
5 years old