STLtoday - Special ink to mark livestock is in trial stage
The St. Louis Post-Dispatch reports, "The radio-frequency identification product [...] will allow producers of cattle, sheep, goats, hogs and other hair-bearing livestock (but not poultry) to mark, identify and track their animals with an ink tattoo."

Comment: This is a revolutionary technology that combines the simplicity of an ink tattoo with the identity tracking capability of radio-frequency identification (RFID) chips. Let's keep an eye on this one!