35. Chihuahua
Chihuahuas are small dogs that can be lively and loud. The AKC notes they are also recognized for loyalty, politeness, and generosity. Chihuahuas possess a “terrier temperament,” meaning they are intelligent but may confuse playful behavior with adult actions. Even if they fit in a purse, they can be quite vocal. Strict discipline is essential for optimal results with these tiny dogs.