Introduction to Equine Feeding
Horses are herbivores with a unique digestive system designed for continuous grazing. However, modern management often requires scheduled meals. A scientifically balanced morning and evening feeding routine ensures optimal health, performance, and longevity. This guide covers dietary types, portion sizes, nutrient requirements, and feeding management for horses of all ages and activity levels.
Recommended Diet Types
Forage First
Forage (hay or pasture) should form the basis of every horse's diet. It provides fiber for gut health, dental wear, and behavioral satisfaction. Aim for at least 1.5-2% of body weight in forage daily. Quality hay (timothy, orchard grass, or bermudagrass) is essential. Legume hay (alfalfa) is higher in protein and calcium, suitable for growing or lactating horses but may be too rich for others.
Concentrates
Grains (oats, corn, barley) or commercial feeds provide additional energy for working horses. Choose feeds formulated for your horse's life stage and workload. Avoid high-starch grains for easy keepers or horses prone to laminitis. Alternatives include beet pulp (soaked) and oil supplements for fat calories.
Supplements
Supplements may be needed for specific deficiencies. However, a balanced forage and concentrate diet often meets most requirements. Common supplements include vitamin E and selenium (for immune and muscle health), omega-3 fatty acids (for skin and coat), and probiotics (for gut support).
Portion Sizes and Daily Caloric Needs by Age, Size, and Activity
| Horse Type | Body Weight (kg) | Activity Level | Daily DE (Mcal/day) | Total Feed (kg/day - DM) |
|---|---|---|---|---|
| Adult Maintenance | 500 | Light (pleasure riding) | 16-18 | 8-10 |
| Adult Moderate Work | 500 | Moderate (dressage, jumping) | 20-24 | 9-12 |
| Adult Heavy Work | 500 | Heavy (eventing, racing) | 26-35 | 11-15 |
| Growing Yearling | 350 | Moderate growth | 15-18 | 6-8 |
| Senior Horse (≥20 yrs) | 500 | Light | 16-20 | 8-10 (easily digestible) |
Note: DE = Digestible Energy. Actual needs vary; consult a vet or equine nutritionist. Divide total feed into two or more meals. Morning meal should be slightly smaller (40-45%) and evening meal larger (55-60%) to avoid large grain meals.
Feeding Frequency and Timing
Horses should eat at least two meals per day. Ideally, provide three or more small meals to mimic grazing. Morning feeding: around 6-8 AM. Evening feeding: 6-8 PM. Keep meal times consistent. Never feed large grain meals less than one hour before or after exercise to reduce risk of colic or tying-up.
Essential Nutrients
Protein
Essential for muscle repair, growth, and hoof quality. Requirement: 8-12% crude protein for maintenance, up to 14-16% for growing or lactating horses. Quality sources: soybean meal, alfalfa hay.
Fat
Concentrated energy source (2.25 times more calories than carbs). Supports skin, coat, and additional calories without starch. Safe up to 10% of diet. Sources: vegetable oil, rice bran, flaxseed.
Carbohydrates
Fiber (from forage) is essential. Starches and sugars provide quick energy but should be limited (<25% of diet) to avoid metabolic issues. Use grains like oats which are safer due to lower starch content.
Vitamins and Minerals
Key vitamins: fat-soluble (A, D, E) and water-soluble (B-complex). Minerals: calcium, phosphorus, magnesium, potassium, sodium, sulfur, and trace minerals (copper, zinc, selenium, iron). A balanced ration balancer or supplement can fill gaps. Ensure correct calcium:phosphorus ratio (2:1 to 1:1).
Toxic or Harmful Foods and Ingredients
- Moldy or spoiled hay (mycotoxins) – can cause colic, respiratory issues.
- High-starch grains in large meals – risk of laminitis, colic, gastric ulcers.
- Grass clippings – can lead to choke and laminitis.
- Avocado (persin) – toxic.
- Chocolate (theobromine) – toxic.
- Caffeine in coffee/tea – unsafe.
- Nightshade plants (green potatoes, tomatoes) – contain solanine.
Water Intake Recommendations
Fresh, clean water must be available at all times. Average consumption: 5-10 gallons (20-40 liters) daily for a 500 kg horse. More in hot weather, work, or for lactating mares. Check water buckets/troughs daily. In winter, prevent freezing. Reduce salt intake if water consumption drops.
Beneficial Supplements
- Electrolytes: for heavy sweating (sodium, potassium, chloride).
- Vitamin E and selenium: antioxidant support, especially if hay is stored long.
- Omega-3 fatty acids: from flaxseed or fish oil for anti-inflammatory effects.
- Probiotics and prebiotics: to maintain healthy gut flora during stress or antibiotics.
- Joint supplements: glucosamine, chondroitin, MSM for older or arthritic horses.
Feeding Differences by Life Stage
Foals and Weanlings
Nurse for 4-6 months. Start creep feeding (high-quality grain and hay) from 2-3 months. Need higher protein (14-16%) and balanced minerals for growth. Feed small meals frequently.
Adult Horses
Maintenance: forage-based diet with minimal grain if keeping weight. Performance horses: increase energy (fat and digestible fiber) and electrolyte supplementation. Pregnant mares: increase protein and minerals in last trimester. Lactating mares: double energy and protein needs.
Senior Horses
Dental issues may require soaked hay cubes, pelleted senior feeds, or haylage. Lower starch, higher fat and fiber. Add digestive aids (probiotics). Monitor body condition and adjust.
Signs of a Healthy vs. Poor Diet
Healthy Diet
- Shiny coat, clear eyes
- Consistent weight and body condition score (5-6/9)
- Good energy and performance
- Normal manure (formed, not too dry)
- Healthy hooves (no cracking, strong)
Poor Diet
- Dull, rough coat, dry skin
- Weight loss or obesity
- Lethargy or poor performance
- Loose manure, colic episodes
- Hoof problems (cracks, poor growth)
If you notice signs of poor diet, consult a veterinarian or equine nutritionist. Adjust feeding gradually over 7-10 days.