Smartest pet?

What comes to your mind at first – dogs? No, these are pigs! Potbellied pigs are easily trained and have an alert curiosity and affectionate nature. They’re smarter than the smartest dogs, and just as appreciative of a good belly-scratch. They’re quick to house-train, are quite clean and odor-free animals, they don’t bark, don’t chew and shed very little. Their eyesight is poor but they have a keenly developed sense of smell. But be careful - cute piglets can grow to be quite large pigs. Source: amolife.com