Name one method to ensure biosecurity on a livestock farm.

Quarantining newly introduced animals is a critical method for ensuring biosecurity on a livestock farm. When new animals are brought in, they may carry diseases or parasites that can spread to the existing herd, potentially causing significant health issues and economic losses. By isolating these new animals for a period of time, farmers can monitor their health and ensure that they do not show any signs of illness before they come into contact with the rest of the livestock. This proactive measure helps to protect the overall health of the farm and maintain biosecurity standards, preventing the introduction of pathogens into the herd.

In contrast, while other methods like improved feeding, regular vaccinations, and free-range grazing can contribute positively to overall animal health, they do not specifically address the risks associated with introducing new animals to a farm. Improved feeding can enhance growth and well-being, regular vaccinations protect against specific diseases, and free-range grazing has its own advantages in terms of animal welfare, but none of these directly mitigate the risk of disease transmission from new additions to the livestock population like quarantine does.