A Cambodian toddler is living partly on milk he suckles directly from a cow.Tha Sophat, a 20-month-old boy, started suckling the cow after watching a calf do the same.His grandfather, Um Oeung, of Koak Roka village, Siem Reap province, says he pulled the boy away at first.But he relented after his grandson protested loudly and the boy had suckled the cow's milk once or twice a day since then.Tha Sophat has lived with his grandparents since his parents moved to Thailand looking for work.Um Oeung said the cow doesn't mind the boy suckling but he is worried about his grandson's health if he continues.