When Should I Vaccinate My Horse?

Short answer

Vaccination should follow core guidelines and be adjusted based on risk.

The AAEP classifies vaccines as core (recommended for most horses) and risk-based (dependent on region, exposure, and travel). Programs should be developed in consultation with a licensed veterinarian (AAEP).

Real-Life Example

Your horse lives at home with no travel.

Another boards, shows monthly, and mixes with horses from multiple states.

Their vaccination risk profiles are different — even if they live in the same region.

Exposure changes decisions.

It Depends

Vaccination schedules vary based on:

• Travel frequency
• Show participation
• Boarding or herd size
• Regional disease prevalence
• Age
• Pregnancy status

Risk-based vaccines should reflect actual exposure risk — not assumption.

When to Seek Guidance

If you’re unsure about:

• Regional disease prevalence
• Timing for boosters
• Young, senior, or immunocompromised horses

Work directly with your veterinarian.

Vaccination plans are medical decisions — not internet checklists.

Sources:
AAEP Vaccination Guidelines