RFID or radio frequency identification is the name of a technology that is effective to track the objects or even individual. This technology is more powerful and faster compared to bar coding. No cable or wire is required in this technology since it involves tags or chips.
You need to insert those tags within the body of the animal. These tags can send the signal to the tracking unit so that connection can be established to track the animal. You may search for the RFID chip timing Davenport Iowa on the Internet to get more information on this regard.