10. Jack Russell Terrier
The Jack Russell Terrier seems to be missing from many smart dog breed lists. Perhaps it is because this clever little dog moves too fast to be noticed by some. The Jack Russell, along with the closely related Parson Russell Terrier, is a fearless, energetic dog with a sharp wit and a stubborn streak. There’s no fooling this little terrier. Good luck trying to stop this dog from getting what it wants. Because of their energy and brainpower, these breeds excel at dog sports like agility and barn hunting. Their desire to keep moving can make training challenging at first but rewarding once you see how well these dogs can perform.