Clever dog learns to buy treats with leaves

For many dogs, food is the way to their heart. Nothing beats a delicious treat, and if dogs think that you have a special treat just for them, they'll beg for it. Some dogs turn on the sad puppy eyes or resort to doing tricks to see if someone will give them a treat. For one special dog named Negro, though, the trick to getting treats was leaves.

Negro, a black lab, has lived at Colombia's Diversified Technical Education Institute of Monterrey Casanare for about five years. He watches over things and the faculty give him food and water, as well with a safe place to live. Lately, it seems that Negro has decided it's his duty to purchase his extra treats.

There's a small store on campus where students can buy things during breaks between classes. Sometimes, they even give Negro cookies that they bought at the store. That was Negro's first lesson in buying special treats.

Soon, Negro showed up at the store holding a leaf in his mouth. He wagged his tail and made it clear he wanted a cookie.

Though Negro's currency was a bit different from how students paid, the store happily accepted it. Negro exchanged his leaf for a cookie and learned an important lesson: He could buy treats of his own with leaves.

Negro learned this lesson quickly, and put it to test on a daily basis. He now arrives at the store with a leaf in his mouth and is rewarded with a cookie. As you can imagine, Negro has made this a regular habit.

Negro has been buying treats for years, so store staff make sure that he's only given treats safe for dogs. They also limit Negro's purchases to just a few treats a day. This super smart dog has learned about commerce, and as for the rewards of that lesson? Well, they're delicious.