Which of the following is NOT a typical identification method for livestock animals?

The method of identification that is not typically used for livestock animals is GPS tracking. While GPS technology can provide valuable location information, it is not a conventional means of identifying livestock.

Traditional livestock identification methods, such as earmarking, tattooing, and microchipping, are more focused on providing a reliable means of recognizing individual animals, often for the purposes of management, health tracking, breeding records, and ownership identification. Earmarking involves making distinctive marks on the ears of animals, while tattooing involves applying permanent identification marks to the skin, commonly in inconspicuous areas. Microchipping utilizes a small chip implanted under the skin, which can be scanned to reveal the animal's identity.

In contrast, GPS tracking is more related to monitoring movements and location rather than establishing identity. Although it has applications in livestock management, it is not recognized as a typical method of identification in the more conventional sense.