23. Border Collie
The Border Collie is celebrated for its exceptional intelligence and unrelenting energy, making it one of the most demanding dog breeds.
They require constant mental and physical stimulation, thriving on challenging tasks and vigorous exercise.
Border Collies are happiest with owners who can provide them with daily training, games, and activities.
Without sufficient engagement, they may become bored or develop behavioral issues.
For more on their care and needs, visit the Border Collie Society of America.