Cows are seen at a barn on the 35-hectare farm managed by New Zealand dairy export giant Fonterra Co-operative Group in Hangu County, near the city of Tangshan, around 250km (155 miles) east of Beijing March 15, 2012. With more than 3,000 cows imported from New Zealand, the farm now produces nearly 100,000 litres of milk per day and around 28 million litres of milk per year for the domestic market. The farm is a feedlot system with the animals housed in barns and feed bought from local farmers. Fonterra, which controls 30% of the world's dairy exports and is New Zealand's largest company, has shifted to direct production in China after formula sold by its Chinese partner was found in 2008 to be laced with melamine, an industrial chemical added to low-quality or diluted milk to give misleadingly high protein readings. REUTERS/David Gray (CHINA - Tags: ANIMALS BUSINESS AGRICULTURE FOOD)