Federal authorities say it is likely being carried from farm to farm on objects like farm equipment or clothing that has touched a sick cow.

Northwest Naturals is recalling a line of its pet food after authorities Oregon linked the death of a cat to a batch contaminated with bird flu.

The U.S. Centers for Disease Control and Prevention says a patient has been hospitalized with a severe case of H5N1 infection in Louisiana, making it the first instance of a severe illness linked to the virus in the United States.