The study examined simultaneous individual animal identification of newly weaned piglets based on
radio frequency identification (RFID) using passive high frequency (HF) transponders focusing on identification rate and identification accuracy. The antenna for simultaneous individual animal identification
was integrated into the round trough of the feeder and connected to a conventional high frequency long
range reader. HF transponders were attached to the eartags of the piglets. An anti-collision system was
used in order to facilitate simultaneous registration of animals which were within reading range of the
antenna at the same time. Anti-collision systems allow multiple access handling and prevent the collision
of transponder data within the reading range of a RFID reader, which would render data unreadable. In
order to determine the identification rate of this innovative system, trough visits of selected focal animals
registered by the simultaneous individual animal identification were verified using video observation.
The anti-collision system of simultaneous individual animal identification was validated through group
observations.
The identification r