Nebraska agriculture officials say another 1.8 million chickens must be killed after bird flu was found on a farm in the latest sign that the outbreak that has already prompted the slaughter of more than 50 million birds nationwide continues to spread.
The Nebraska Department of Agriculture said Saturday that the state's 13th case of bird flu was found on an egg-laying farm in northeast Nebraska's Dixon County, about 120 miles (193 kilometers) north of Omaha, Nebraska..
