What does an orange USDA metal tag indicate on cattle?

The presence of an orange USDA metal tag on cattle signifies that the animal has been vaccinated for brucellosis. This vaccination is crucial for controlling the spread of brucellosis, a highly infectious disease that can affect cattle and humans. The orange tag serves as a visual identifier for producers, veterinarians, and regulatory personnel, indicating that the animal has received proper immunization against this disease.

By having this tag, it also facilitates traceability and helps in managing health risks within cattle populations. Other options, such as indicating readiness for market or registration status, do not involve the vaccination status, which is specifically denoted by the orange tag. Therefore, the correct interpretation of the orange metal tag directly relates to the animal's health management practices concerning brucellosis.