Equine health priorities change dramatically from birth through the senior years. Educational guides for foal care, young horse development, breeding mare health, stallion management, and the special demands of caring for an aging horse.
A foal needs colostrum within 12 hours of birth or risks life-threatening immune failure. A horse over 15 almost certainly benefits from annual ACTH testing to screen for Cushing's disease. A young horse's growth plates need protection from premature athletic loading. A pregnant mare needs EHV vaccination timed precisely to maximize colostrum antibody transfer.
These are not generic horse care recommendations — they are life-stage-specific priorities that change meaningfully as a horse ages. The guides below cover what matters most at each stage and what to discuss with your veterinarian.
| Topic | Key Point | Action |
|---|---|---|
| Neonatal foal (0–7 days) | IgG testing at 18–24 hrs; navel dipping; meconium passage monitoring | Schedule vet exam at 12–24 hours of age |
| Foal (1–6 months) | Primary vaccination series begins at 4–6 months; Parascaris deworming | Discuss with vet based on mare vaccination status |
| Weanling–2 years | OCD radiograph survey in high-risk breeds; dental exams every 6 months | Nutritional balance; avoid over-supplementation |
| 2–4 years | Growth plate closure timing; beginning training workload | Graduated conditioning; pre-training soundness eval |
| Adult horse (5–14) | Annual vaccinations, FEC-based deworming, dental exam, wellness visit | Coggins for travel; ACTH if any signs |
| 15+ years | Annual ACTH testing (PPID screen); biannual dental; biannual vet exam | Weight monitoring monthly; joint management discussion |
| Pregnant mare | EHV at 5/7/9 months; core vaccines 4–6 wks before foaling | Pre-breeding exam; colostrum quality test pre-foaling |
| Stallion | Annual pre-season BSE; current Coggins; penile hygiene | Illness 6–8 weeks before season = semen quality risk |
HorseVeterinarian.AI is a free educational resource from Bridle & Bit Magazine. Your horse's life-stage health plan is a conversation best had with a veterinarian who knows your horse.
Find an Equine Vet Near You →Different life stages create fundamentally different health priorities. A condition that's routine for a senior horse — PPID, dental wear, arthritis — is an emergency flag in a foal. Understanding what's appropriate for each stage makes you a more effective observer of your horse's health over a lifetime.
| Life Stage | Age Range | Primary Health Priorities | Most Impactful Annual Action |
|---|---|---|---|
| Newborn foal | Birth to 30 days | Colostrum/IgG adequacy; septicemia prevention; meconium passage; joint health | IgG test at 18–24 hours — everything else follows from this |
| Growing foal | 1 month to weaning (~6 months) | OCD risk from nutrition/growth rate; parasite exposure (Parascaris); passive immunity transition | Fecal check at 6–8 weeks; diet review to avoid rapid growth spurts |
| Weanling | 6–12 months | High parasite risk; dental eruption monitoring; OCD screening; stress from weaning | OCD radiographic survey if high-risk breed; vaccination primary series |
| Young horse | 1–4 years | Growth plate closure timing limits training intensity; dentition transition (baby → adult teeth); OCD management | Biannual dental exams; growth plate-appropriate training load |
| Mature performance horse | 4–15 years | Discipline-specific injury prevention; joint health management; gastric ulcers if high-performance | Annual pre-season soundness evaluation; discipline-specific joint program |
| Senior horse | 15+ years | PPID (Cushing's) — affects 20%+ over 15; dental wear reducing chewing efficiency; arthritis management; weight maintenance | Annual ACTH blood test — the single highest-impact action in a senior horse |
Vaccination timing is not one-size-fits-all — it depends on maternal antibody status, geographic risk, and the horse's intended use. The following provides general guidance; your veterinarian will customize timing based on your specific situation.
| Life Stage | Core Vaccines | Timing Notes | Risk-Based Additions |
|---|---|---|---|
| Foal from vaccinated dam | EEE/WEE, Tetanus, WNV, Rabies — primary series beginning at 4–6 months | Maternal antibodies interfere with earlier vaccination; wait for waning | Influenza, EHV starting at 6 months if exposure risk |
| Foal from unvaccinated dam | Same core vaccines beginning at 3–4 months | Start earlier due to lack of maternal protection | Discuss with vet based on facility exposure risk |
| Weanling–Yearling | Complete primary series; establish adult schedule by 18 months | Multiple boosters needed to complete primary series | Add risk-based based on show/event attendance |
| Adult horse (non-pregnant) | Annual core vaccines; risk-based as appropriate | Spring timing before mosquito season for WNV and EEE; Rabies annually | Influenza/EHV every 3–6 months for show horses; Strangles if high exposure |
| Pregnant mare | Core vaccines 4–6 weeks before foaling (maximizes colostrum antibodies); EHV at months 5, 7, 9 | Pre-foaling timing is critical for colostrum antibody transfer to foal | Botulism in endemic areas; discuss with reproductive vet |
| Senior horse (15+) | Same core protocol; may benefit from more frequent schedules due to immunosenescence | Discuss whether twice-yearly core vaccination is appropriate | Monitor response; senior horses may have reduced immune response to vaccines |