The US has filed a complaint with the World Trade Organization over Chinese duties on US poultry products that have been as high as 105.4%, and led to a drastic reduction in US poultry exports, Bloomberg reported. US poultry exports to China have fallen by around 90% since China established anti-dumping and countervailing duties on the product last year, according to the US trade commission. The US poultry industry may lose up to US$1 billion in sales from China this year, the agency added. The US was China’s largest supplier of chicken-broiler products in 2009, shipping more than 600,000 metric tons, and it remains a major supplier of pork. The complaint filing marks the start of the lengthy WTO consultation process; the countries will now begin at least two months of negotiations.