What identification technique allows for an individualized approach to tracking swine?

The technique that allows for an individualized approach to tracking swine is ear notching. This method involves creating unique patterns of notches in the ears of pigs, which can be easily identified by farmers and veterinarians. Ear notching provides a reliable way to monitor the health, breeding, and lineage of individual animals, ensuring precise record-keeping for herd management. Each notch pattern correlates to specific information about the animal, allowing for effective tracking as they grow and reproduce.

Fencing, while important for managing livestock, does not provide any method for tracking individual animals. Branded markings are useful for larger identification but can be less precise compared to ear notching since they may vary or fade over time and are not as detailed. Grouping by age may assist in management practices but does not facilitate tracking specific individuals, which is crucial for health monitoring and breeding records. Thus, ear notching is the best method for individualized tracking of swine.