A Chinese man says his beer-drinking pet duck can understand him. Grandpa Cao takes six-year-old Yaya for a walk through Dalian city every day, reports Northeast News Network. "He understands every instruction I give him, such as to tumble or to fly. But when he's tired he turns his back on me," says Cao. He feeds Yaya on peanuts mainly, but says he also enjoys shrimp and other sea food as snacks - with a beer. "When he eats, he needs a bowl of beer, otherwise he won't be happy," added Cao.