Dogs can range in weight from 1 pound to more than 150 pounds. There are hundreds of different breeds of dogs, so discerning the "average" dog weight is virtually impossible.
The Guinness World Record for the world's smallest dog is held by Miracle Milly, a female Chihuahua who is only 3.8 inches tall and weighs only one pound. At birth, Miracle Milly was so small, she could fit in a teaspoon. In contrast, the Guinness World Record for the world's largest dog is held by Zeus, a male Great Dane. Zeus measured 44 inches tall, about the size of a donkey.