Duck meat production and the number of stocks from 1991 to 2008 increased by 185.06% and 92.69%, respectively (FAOSTAT, 2010). Worldwide duck meat production was about 3.95 million tonnes in 2007 and Asia accounted for 84% of the world output (Poultry Hub, 2009). Duck meat production has also increased continuously for the past twenty years around the world and most of this increase occurred in Asian countries.