1. Border Collie: Border Collies are considered one of the smartest dog breeds. They are highly intelligent, obedient, and eager to learn, making them excellent working dogs. They have incredible problem-solving abilities and excel in tasks involving agility and obedience.

2. Poodle: Poodles are known for their intelligence and versatility. They rank highly in trainability and adaptability, making them an ideal breed for various roles such as guide dogs, therapy dogs, and circus performers. They come in three sizes (standard, miniature, and toy) and are renowned for their hypoallergenic coat.

3. German Shepherd: German Shepherds are famous for their intelligence, loyalty, and versatility. They are commonly used as working dogs in roles like search and rescue, police work, and guide dogs. They are quick learners and have a strong sense of duty, making them excellent guardians and companions.

4. Golden Retriever: Golden Retrievers are intelligent, gentle, and highly trainable. They are renowned for their friendly nature and make excellent service and therapy animals. They excel in tasks such as obedience, agility, and search and rescue due to their loyalty and natural instincts.

5. Doberman Pinscher: Dobermans are known for their exceptional intelligence, loyalty, and protective instincts. They are fast learners and have a natural desire to please their owners. With proper training and socialization, they make excellent guard dogs, as well as beloved family pets.

6. Shetland Sheepdog: Shetland Sheepdogs, or Shelties, are highly intelligent and excellent problem solvers. They have superb herding abilities and are adept at various activities like agility, obedience, and tracking. Shelties are also known for their loyalty and gentle nature.

7. Labrador Retriever: Labradors are intelligent, versatile, and highly trainable. They are often used as service dogs, therapy dogs, and search and rescue dogs due to their intelligence and gentle demeanor. They are excellent family pets and have a natural affinity for water and retrieving.

8. Papillon: Papillons may be small, but they pack a significant intelligence punch. They are highly trainable, possess impressive problem-solving skills, and excel in agility and obedience competitions. Known for their distinctive butterfly-like ears, Papillons are also affectionate and outgoing companions.

9. Rottweiler: Rottweilers are intelligent, confident, and fearless. They are highly trainable and often used in various working roles, including search and rescue, police work, and guard dogs. With proper socialization and training, Rottweilers can be loyal and loving family pets.

10. Australian Shepherd: Australian Shepherds, despite their name, were actually developed in the United States. They are intelligent, energetic, and highly trainable. They excel in herding, obedience, and agility, and have a strong work ethic. They make devoted companions and thrive in active households.