BUFFALO, Minn. – Nearly 1 million chickens on a Wright County egg farm have been killed after the highly pathogenic avian influenza was discovered on the factory-scale flock. Eliminating affected flocks is an attempt to slow the disease from spreading. The Wright County outbreak, 45 miles nirthwest of Minneapolis, was the latest mass elimination in recent weeks in the region. The U.S. Agriculture Department earlier ordered 26,800 turkeys be killed on a farm in South Dakota’s McPherson County (near western Minnesota), and nearly 17,000 birds on two farms in Iowa’s Clay County (on the southwest Minnesota border).