9. Shih Tzu
The Breed Stats: Shih Tzus weight around 10-19 pounds and stand no more than 1 inches.This breed originated from China and is one of the oldest breeds in the world. The little Shih Tzus are calm, gentle and loyal. They can be a good apartment pet, but not good as a guard dog. Their fur grows like human hairs and requires daily grooming when it gets long. But considering their small size and weight, it is an easy task to fulfill.