Foal Vaccination Guide: 2025 Vet Schedule & Care by Dr Duncan Houston 🐴💉

Welcome! I'm Dr Duncan Houston, veterinarian and founder of AskAVet.com. In this 2025 guide, we cover essential information on **foal vaccinations** — explaining core vaccines, risk-based options, timing, maternal antibody effects, and management to help your foal build robust immunity and thrive.

🧬 Core vs Risk-Based Vaccines

Core vaccines protect against widespread, serious diseases:

Rabies
Tetanus
West Nile Virus
Eastern & Western Encephalitis (EEE/WEE)

Risk-based vaccines depend on region and lifestyle:

Equine Influenza
Equine Herpesvirus (EHV‑1/4)
Strangles
Potomac Horse Fever
Leptospirosis, Botulism
Equine Viral Arteritis, Snake bite

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🕒 When to Vaccinate Foals

💡 Begin at **4–6 months** (core vaccines), with a **booster 4–6 weeks later**. A third dose around 10–12 months completes primary immunity. Foals born to unvaccinated mares may start earlier (3–4 months) and follow a 3-dose course. :contentReference[oaicite:4]{index=4}

Vaccine	Timing	Notes
EEE/WEE	4–6 mo + booster; 3‑dose series if mare unvaccinated	Vector-borne, adjust for region/risk :contentReference[oaicite:5]{index=5}
West Nile	4–6 mo + booster; third at 10–12 mo	Add early booster in endemic zones :contentReference[oaicite:6]{index=6}
Rabies	7–8 mo with annual boosters thereafter	Fatal; core vaccine :contentReference[oaicite:7]{index=7}
Tetanus	5–6 mo + booster; annual follow-up	Essential for all horses :contentReference[oaicite:8]{index=8}
EHV‑1/4	5–6 mo + booster; biannual if high risk	Protects against respiratory/abortion strains :contentReference[oaicite:9]{index=9}
Influenza	9 & 11 mo (intranasal) or 2‑3 doses starting 4–6 mo	Risk-based; performance foals need early series :contentReference[oaicite:10]{index=10}
Strangles	5–6 mo start; boosters every 6–12 mo	Killed or M‑live; risk-based :contentReference[oaicite:11]{index=11}
Risk Vaccines (PHF, Botulism, Lepto)	5–6 mo + booster 3–6 weks later	Based on local risk; PHF common East :contentReference[oaicite:12]{index=12}

🛡️ Maternal Antibody Interference

Foals with high colostral antibodies may not respond well to early vaccines. That’s why the recommended start is at 4–6 months. Work with your vet to determine timing for earlier vaccination when needed. :contentReference[oaicite:13]{index=13}

🧪 Pre-foaling Mare Vaccination

Vaccinating mares 4–6 weeks before foaling boosts colostral immunity in newborns. Pre-foaling vaccines for core diseases (EEE/WEE, WNV, rabies, tetanus, influenza, EHV) are highly recommended. :contentReference[oaicite:14]{index=14}

📦 Risk-Based Shots for Foals

Potomac Horse Fever: 5–6 months + booster (common in East) :contentReference[oaicite:15]{index=15}
Leptospirosis: 6 months + booster 3–4 weeks later; risk varies :contentReference[oaicite:16]{index=16}
Botulism: May begin as early as 2 weeks in endemic areas; 3-dose series :contentReference[oaicite:17]{index=17}

🧰 Monitoring & Boosters

Perform annual boosters based on core/risk profile.
Biannual boosters for EHV, influenza, PHF in high-exposure horses.
Maintain thorough vaccination records and consult vet each breeding season.

📈 Benefits & Rationale

Starts immunity when foals become susceptible.
Protects against severe and contagious equine diseases.
Reduces disease outbreaks in barns, events, and breeding farms.
Supports welfare and performance readiness.

📲 AskAVet Integration

Track schedules via the AskAVet.com app: set reminders, confirm vaccination timing based on mare history, share records with vets, and adjust protocols based on regional risks. 💙

🌟 Final Thoughts from Your 2025 Vet

A thoughtful vaccination protocol is essential for foal health. With a core series at 4–6 months, boosters, risk-based shots, and maternal planning, your foal builds strong immunity. AskAVet.com makes record-keeping and adjustment easy—ensuring your young horse starts life protected. 🐎✨

— Dr Duncan Houston, BVSc • AskAVet.com