There are various ways to test a dog's smarts including IQ tests, trick training, and measuring emotional intelligence.
Border collies, poodles, German shepherds, golden retrievers and Doberman pinschers are consistently ranked as the most intelligent dogs.
Chows chows, bulldogs, basenjis and beagles are often considered the least smart dog breeds based on trainability and instinctive intelligence.
Border collies, poodles, German shepherds, golden retrievers and Doberman pinschers are the easiest breeds to train. They excel at obedience.
Standardized dog IQ tests like the Stanley Coren test assess instincts, adaptability, obedience and more.
Dogs like Papillons, Labrador retrievers and Chihuahuas tend to score higher in emotional intelligence tests based on social skills.
A dog's intelligence depends on breed tendencies but also environment, training and genetics of each individual dog.