Broodmare Care

📖 What Is a Broodmare?

A broodmare is a female horse specifically used for breeding purposes — to carry, deliver, and nurse foals. The term comes from the Old English brōd, meaning "offspring" or "young." Broodmares are the foundation of every breeding program, and their care directly determines the health, growth, and future performance of their foals.

Not every mare makes a good broodmare. The best candidates are healthy, well-conformed, and possess a calm temperament. Ideally, a broodmare should be at least 3–4 years old and have reached her full skeletal maturity before her first pregnancy. Mares can successfully carry foals well into their late teens and even early twenties, though fertility does gradually decline with age.

⚖️ Body Condition Score (BCS) for Broodmares

The Henneke Body Condition Scoring System is the gold standard for assessing a mare's nutritional status. It uses a 1–9 scale based on visual and palpable fat at six key body areas: neck, withers, shoulder, ribs, loin, and tailhead.

A healthy BCS 6 mare should show slight fat cover over ribs 🤰

🍽️ Feeding by Trimester

A broodmare's nutritional needs change dramatically throughout pregnancy. The key principle: feed the mare, not just the foal — underfeeding leads to poor foal development; overfeeding leads to obesity complications.

🌾 Early Gestation (Months 1–6)

During the first half of pregnancy, the fetus is tiny and grows slowly. The mare's nutritional requirements are essentially the same as maintenance. The biggest mistake breeders make here is overfeeding early — the mare gets fat, not the foal.

• Feed the same as a non-pregnant mare: Good quality forage (hay/pasture) at 2–2.5% of body weight daily. A 500 kg mare needs ~10–12.5 kg of hay per day.
• Add a ration balancer — a low-calorie, high-nutrient pellet that provides vitamins and minerals without excess energy. Perfect for easy keepers.
• Body condition monitoring: Check BCS monthly. If the mare is gaining too much weight, reduce — don't wait until late gestation to fix obesity.
• ⚠️ Avoid endophyte-infected tall fescue: This common pasture grass can carry a fungus that causes prolonged gestation, thickened placenta, and lack of milk production. Test your pasture if unsure.

🌾 Late Gestation (Months 7–11)

The final trimester changes everything. The fetus gains 80% of its birth weight during the last 90 days — growing at approximately 0.45 kg (1 lb) per day. Nutrient demands spike dramatically:

Nutrient Increases (vs Maintenance)

• Energy: +28% — add small amounts of grain or concentrate gradually
• Protein: +40% — essential amino acids (lysine, methionine, threonine) are critical for fetal muscle development
• Calcium & Phosphorus: +80% — for fetal skeletal mineralization. Keep the Ca:P ratio at 1.5:1 to 2:1
• Copper, Zinc, Selenium: Dramatically increased — these trace minerals are stored in the foal's liver and used in the first weeks of life
• Vitamin E: Added in late gestation improves colostrum immunoglobulin levels — better passive immunity transfer to the foal

Feeding Adjustments

• Gradually increase concentrate over 7–10 days — sudden changes risk colic
• Total feed = 1.5–2% of body weight in forage + 0.5–1% in concentrate (adjust for BCS)
• Feed smaller, more frequent meals — the growing foal compresses the mare's digestive tract, reducing stomach capacity
• Water is critical: ~38–57 litres (10–15 gallons) per day — the fetus and amniotic fluid demand it

🐎 Foaling Signs & The 1-2-3 Rule

As foaling approaches, your mare will show clear physical and behavioral signs. Knowing them could save the foal's life:

Pre-Foaling Signs (Days to Hours Before)

• Udder development: Begins filling 3–6 weeks before foaling, becomes firm and distended in the final 24–48 hours
• Waxing: Yellowish, wax-like droplets appear on teat ends — typically within 12–36 hours of foaling
• Vulvar relaxation: Vulva elongates and becomes flaccid
• Pelvic ligament softening: Hollow areas appear around the tailhead — the mare looks "caved in"
• Restlessness & sweating: Pacing, pawing, frequently lying down and getting up, sweating patches on neck/flanks — active labor begins

💧 Post-Foaling Care & Lactation

Once the foal arrives, the mare enters lactation — the most nutritionally demanding phase of any horse's life. A lactating mare producing 15–20 litres of milk per day needs:

• 2× maintenance energy — roughly the equivalent of feeding a horse doing intense daily training
• 3% of body weight in dry matter daily — for a 500 kg mare, that's ~15 kg of feed
• Free-choice hay + high-quality concentrates designed for lactation
• Transition diets gradually over 7–10 days post-foaling
• The placenta should pass within 2 hours of foaling — retained placenta is a life-threatening emergency
• Foal will nurse every 15–30 minutes initially — this stimulates milk production

Lactation is the most demanding phase — 2× maintenance energy 🥛

⚕️ Health & Wellness

Broodmares face several pregnancy-specific health risks that owners must be prepared for:

Common Broodmare Health Issues

• Retained Placenta: If the placenta is not expelled within 2 hours post-foaling, it's a life-threatening emergency. Can cause laminitis, sepsis, and death. Friesian mares have a 54% incidence rate — extraordinarily high.
• Dystocia (Difficult Birth): Malpositioned foal, uterine inertia, or oversized foal. Time is critical — call the vet if active labor exceeds 20–30 minutes without progress.
• Mastitis: Bacterial infection of the udder — often from poor hygiene or foal not nursing properly. Hot, swollen, painful udder with abnormal milk.
• Endophyte Fescue Toxicosis: Caused by endophyte-infected tall fescue grass. Results in prolonged gestation, thickened placenta (dystocia), absent milk production, and weak foals. Remove mares from infected pasture 30 days before foaling.
• Uterine Infections (Metritis): Post-foaling bacterial infection — fever, foul-smelling discharge, depression. Requires antibiotics + uterine lavage.

💡 Fun Facts & Trivia