Does a dog's intelligence affect its happiness?

A dog's intelligence directly impacts its happiness through its need for mental engagement. Highly intelligent breeds, such as Border Collies (often ranked #1 in working intelligence) and Poodles (ranked #2), require significant mental stimulation to prevent boredom and destructive behaviors. While all dogs benefit from mental exercise, those with higher problem-solving abilities or trainability will experience greater fulfillment when their cognitive needs are met. Conversely, a lack of appropriate mental challenges can lead to frustration and unhappiness, regardless of a dog's specific IQ. Discover how to best engage your dog's unique intellect in our comprehensive guide.