In a world where diseases spread so rapidly, the concept of biosecurity is front and center. And nowhere is it more important than where animals mingle—like horse breeding barns.

Biosecurity refers to ways of reducing the spread of disease from one locale to another. Pathogens can be brought into the breeding shed from many sources, including horses, semen, wildlife, vehicles—and even humans who track germs in.

Before horses are allowed entry, many breeding facilities require tests for— and vaccination against—specific diseases. Within each facility, every area has its own biosecurity strategy, although general measures include cleaning and disinfecting, donning protective gear and monitoring and recording activity.

In short, being proactive is key. That way, the barn door won’t close after the horse—or the germs—get out.