Tetanus vaccination frequency depends on the vaccine and the horse's risk factors. Foals typically start at 4–6 months with a booster 4–6 weeks later. Adult horses need two initial doses spaced 4–6 weeks apart.
Booster Schedule
• High-risk horses: annual boosters.
• Moderate-risk horses: every 2–3 years.
• Low-risk horses: every 5 years.
Age, exposure risk, and vaccination history all influence the schedule. Consult your veterinarian for a plan tailored to your horse.