Dolphins are considered some of the smartest animals on Earth At least that's the "official" explanation. What about dogs, you say? Their intelligence varies widely across breeds, but they can certainly learn new skills and exhibit emotional intelligence. He is the smartest sweetest dog I have ever had. I speak from experience. It is the owner of ANY dog that decides how they turn out." "No! It's the training, not the breedmuch like humans." "Seriously? Absolutely not." "No!" According to DogsBite.org .