Biosecurity measures prevent disease spread between farms and protect both animal and human health. Well-designed biosecurity also reduces the need for antibiotic use and improves animal welfare.
Poor biosecurity causes animal suffering through preventable disease outbreaks. Respiratory diseases, enteric infections, and viral diseases cause significant pain and distress before death or treatment. Outbreak responses — mass culling, movement restrictions, stressful transport for testing — cause additional welfare harm. Proactive biosecurity investment protects animals from suffering rather than treating it after it occurs. There is a clear welfare-economics alignment: healthy animals grow better, require fewer treatments, and have lower mortality. The welfare case for biosecurity is strong.