Dairy cows on farms in Texas and Kansas have tested positive for bird flu in the first known cases in cows in the U.S., and likely the world. Cows in New Mexico are also thought to have been infected, but they have not yet been tested.
Three weeks ago, the cows became sick with a cold-like illness, The Associated Press reported. The animals were producing less milk than usual, their appetites decreased and they appeared lethargic.
