Border Collie

The Border Collie is the smartest dog breed when it comes to obedience & work intelligence.
In fact, the world’s most intelligent dog was a Border Collie who knew over 1,000 nouns. But it doesn’t stop there. They’re some of the best herding dogs with extremely high instinctive dog intelligence. And with their ability to learn from the past, Border Collies are believed to have a high adaptive IQ.