Vaccinations for Horses
What Every Horse Owner Should Know
Why Vaccinate?
- Protect your horse’s health: Vaccines stimulate immunity, enabling your horse to fight potentially fatal diseases.
- Save money and time: Preventing disease avoids expensive treatments and lost riding time.
- Support your barn community: Healthy vaccinations help avoid outbreaks that could shut down barns or cancel events.
Core Vaccine Schedule
Guided by AAEP and regional needs
Vaccine
Tetanus
Initial Course
2 doses (4 weeks apart), starting at 3 months
Booster Schedule
Booster at 12 months, then every 2–5 years
Equine Influenza
Equine Herpes Virus (EHV‑1 & 4)
Strangles
3-dose primary series
2 doses ≥ 5 months old (4–6 weeks apart)
2 doses, 4 weeks apart
3-dose primary series
Booster 6 months later
Annual thereafter
Consider Risk-Based Vaccines
Tailor to travel habits, local disease threats, and barn exposure.
- Eastern & Western Encephalomyelitis (EEE/WEE) – Annual, spring
- West Nile Virus – Annual, spring
- Rabies – Annual (public health importance)
- Botulism – Annual (especially for foals or horses eating haylage)
Tailoring Your Horse’s Vaccine Plan
Every horse has unique needs. A customized plan should consider:
- Age & health: Foals and seniors need care-based timing
- Activity level & travel: Show horses often require more boosters
- Geographic risks: Local diseases, seasonality
Veterinarians use this information to craft personalized, balanced schedules—maximizing protection while minimizing stress.
What If You Miss a Booster?
If boosters are delayed or missed, restart the initial series to re-establish full immunity.
Peace of Mind & Compliance
- Safe and widely supported: Side effects are rare and mild (e.g., soreness or minor swelling).
- Essential for competition and insurance: Up-to-date vaccines are often mandatory at events and by insurers.
Bottom Line
Vaccination is the foundation of equine health. With core vaccines (tetanus, flu, herpes, strangles) and added risk-based ones, you ensure your horse—and your barn community—stay safe. Work with your veterinarian each spring to review and update the vaccine plan, based on your horse’s age, travel, environment, and changing disease landscape.
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