 USDA says Texas is among four states that will begin voluntary pilot programs to test bulk milk tanks on dairy farms for bird flu. Kansas, Nebraska, and New Mexico make up the other three states. Louisiana Illuminator says the move is intended to help dairy farmers ship herds across state lines and make it simpler for public health officials to track any spread of the virus. Eric Diebel, acting senior advisor for H5N1 Response, says other states are likely to follow