DES MOINES, Iowa (AP) — Iowa agriculture officials say bird flu has been found on another turkey farm in Buena Vista County, two more chicken farms in Sioux County and in a backyard flock of chickens. The four new cases announced Tuesday raise the state’s total to 60 and boosts the number of chickens dead or dying to about 26 million. The latest turkey farm has 24,000 birds raising turkey losses in Iowa to more than 960,000.

One chicken farm has 150,000 egg laying hens and the other 100,000 pullets, younger chickens that were to be egg layers. The backyard flock had 15 chickens. The U.S. Department of Agriculture has confirmed more than 39 million birds in 15 states with the H5N2 virus that scientists believe came to the Midwest this spring with migrating waterfowl.