1. Border Collie: Border Collies are widely recognized as the most intelligent dog breed. They are highly trainable and excel at obedience, agility, and herding.
2. Poodle: Poodles are intelligent and versatile dogs that excel in a wide range of activities, from agility to hunting.
3. German Shepherd: German Shepherds are loyal and intelligent dogs that excel in a variety of roles, including police and military work, search and rescue, and obedience training.
4. Golden Retriever: Golden Retrievers are highly intelligent and eager to please, making them great family dogs and service animals.
5. Doberman Pinscher: Doberman Pinschers are highly intelligent and protective dogs that excel in obedience training and make great watchdogs.
6. Shetland Sheepdog: Shetland Sheepdogs, also known as Shelties, are highly intelligent and trainable dogs that excel in obedience and agility competitions.
7. Labrador Retriever: Labrador Retrievers are highly intelligent and trainable dogs that excel in a variety of roles, including search and rescue, service work, and hunting.
8. Papillon: Papillons are small, highly intelligent dogs that excel in obedience and agility competitions.
9. Rottweiler: Rottweilers are highly intelligent and protective dogs that excel in obedience training and make great guard dogs.
10. Australian Cattle Dog: Australian Cattle Dogs, also known as Blue Heelers, are highly intelligent and active dogs that excel in herding and agility competitions.

These 10 dog breeds are considered the most intelligent due to their ability to learn quickly and problem-solve. However, it is important to note that every dog is unique and may have different strengths and weaknesses when it comes to training and intelligence. Regardless of breed, all dogs benefit from regular training and mental stimulation to keep their minds sharp and active.