A dog named Negro is the campus dog at the Diversified Technical Education Institute of Monterrey Casanare in Colombia. For the past five years, the dog has been a resident canine of the school. The faculty at the university have even provided with food and a place to sleep at night. But this ingenious dog has learned of a way to get treats anytime he wants.
Negro would hang out near a store on campus and he noticed that the students would get treats such as cookies and candies when they handed over green pieces of paper (money) to the cashier. So he decided to try something like that. One day, he got up to the store and handed the cashier a green leaf. The staff was so impressed that they handed him a treat. Since then, Negro has learned to buy treats from the store using leaves.
“He would go to the store and watch the children give money and receive something in exchange,” said Angela Garcia Bernal, a teacher at the school, “Then one day, spontaneous, he appeared with a leaf in his mouth, wagging his tail and letting it be known that he wanted a cookie.” Negro is now been known to visit a store with a leaf in his mouth for payment. And the store has been consistent in kind, handing the clever dog a treat for each green “bill” that he pays.
“He comes for cookies every day,” Gladys Barreto, a store employee, “He always pays with a leaf. It is his daily purchase.”