Bird Flu Hits Barron Co. Flock News | December 4, 2023 | 0 | by Morgan McCarthy Wisconsin’s latest bird flu case is once again in western Wisconsin. The state’s Department of Agriculture on Friday confirmed a case of the flu in a commercial flock in Barron County. Over 114 thousand birds were destroyed in an effort to contain the flu. This is the fourth case of bird flu in western Wisconsin. The Department of Ag says there have been three confirmed cases in commercial bird flocks in Trempealeau County as well.