Cows tagged with RFID are monitored for events and their behaviors are controlled by computers, where activities are tweeted in real-time. …
… “Each cow wears a RFID tag that is used to coordinate her activities with a central computer. As a cow approaches the robotic milking pen, the computer reads the tag and determines whether or not the cow is scheduled to be milked … ” …
Via Mashable: RFID Tagged Cows
RFIDa: RFID Technology is an internet destination dedicated to documenting the application of radio frequency identification technologies. 
