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3. Chihuahua
The Breed Stats: Chihuahuas weigh 4-6 pounds and stand 6-10 inches tall.
Chihuahua is famous for its bat-like ears and big round eyes. Although their bodies are petite, they are fierce and surly. As one of the smallest dog breeds in the world, Chihuahua is suitable to be a protective and loyal family member.
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4. Papillon
The Breed Stats: Papillons measure up with a height of 8-11 inches and weigh around 5-11 pounds.
No one will forget the typical butterfly-like ear of Papillon. Noteworthily, although their bodies are small, they have big brains and are one of the smartest dog breeds in the world. Papillon is pretty lively and usually gets along well with human beings.