Infectious disease outbreaks at equine facilities cause suffering for affected horses and severe disruption requiring biosecurity protocols as routine welfare practice.
Biosecurity represents a preventive welfare intervention — infections prevented mean suffering avoided, and infectious disease causes acute distress and sometimes fatal outcomes. The welfare case for consistent biosecurity practice is compelling, but implementation faces the behavioral economics challenge that the benefit (disease prevention) is invisible while the cost (inconvenience, restriction) is immediate and concrete. Disease outbreaks that cause visible horse suffering are the consequence of invisible biosecurity failures weeks earlier. Building biosecurity into standard operating procedures rather than treating it as an emergency response is the welfare-optimal approach, requiring facility policy rather than individual motivation alone.