The fourth detection was in Sac County in northwestern Iowa on Feb. 19, where 29,665 turkeys were destroyed and the second in O'Brien County, also in northwestern Iowa, where 40 commercial layer birds were destroyed. The first detection of the disease was in eastern Iowa in Clinton County in early January.

The bird flu in a flock in western Iowa is the second detection of the deadly virus in Iowa poultry in a week and affected the largest flock so far this year. Entire flocks are culled to help prevent the spread of the virus.

BUENA VISTA COUNTY, Iowa (KCRG) - A case of bird flu has been detected in a commercial flock in Buena Vista County. This is Iowa’s sixth case of the bird flu detected amongst domestic birds this year. Governor Kim Reynolds has declared a disaster proclamation for Buena Vista County, effective through April 13th.

The Iowa Department of Agriculture and Land Stewardship says this case is out of a commercial pullet farm in Buena Vista County. This is an operation that raises young chickens into egg-laying chickens before they are moved to another facility. This bird flu case is the sixth confirmed case of bird flu in Iowa thus far in 2025.

Kim Reynolds authorized a disaster proclamation for Buena Vista County to take effect immediately after announcement of the virus detection. The proclamation give state

A backyard flock in Dallas County was the first known infection in more than two weeks in Iowa poultry. March and April are busy months for migrating birds that might carry the virus.