Introduction
Proper nutrition is the cornerstone of equine health. For adult horses, a two-meal-a-day feeding schedule is widely recommended by veterinarians and equine nutritionists. This guide provides detailed feeding standards, including dietary types, portion sizes, nutrient requirements, and signs of healthy feeding.
Recommended Diet Types
Forage (Hay and Pasture)
Forage should form the basis of every horse's diet, making up at least 50-70% of total daily intake. High-quality grass hay or pasture provides essential fiber for gut health.
Concentrates (Grains and Pellets)
Concentrates are energy-dense feeds used to supplement forage for horses with higher energy needs. Common concentrates include oats, barley, corn, and commercially formulated pellets.
Supplements
Vitamin and mineral supplements may be necessary to balance deficiencies, especially in hay-only diets. A balanced ration balancer is often recommended.
Portion Sizes and Daily Caloric Needs
Daily feed intake is based on body weight (BW). An adult horse typically consumes 1.5-2.5% of its BW in feed (dry matter) per day.
| Body Weight | Forage (lbs/day) | Concentrate (lbs/day) | Total Calories (Mcal/day) |
|---|---|---|---|
| 1,000 lbs | 15-20 | 0-5 | 16-20 |
| 1,200 lbs | 18-24 | 0-6 | 20-24 |
| 1,500 lbs | 22-30 | 0-8 | 25-30 |
Caloric needs vary by activity level: maintenance (no work), light work (1-2 hours), moderate work (2-4 hours), or heavy work (4+ hours). Increase concentrate proportionally for work level.
Feeding Frequency and Schedule
Adult horses should be fed at least twice daily, ideally 12 hours apart. Example schedule:
- Morning meal (7:00 AM): Half of daily forage and concentrate
- Evening meal (7:00 PM): Remaining half
Consistency is key; horses thrive on routine. Always feed hay before concentrates to slow consumption and reduce digestive upset.
Essential Nutrients
Protein
Adult horses need 8-12% crude protein in their diet. Essential amino acids like lysine are critical for tissue repair.
Fats
Fats provide energy and support skin/coat health. Include 2-6% fat in the diet, often from vegetable oil or flaxseed.
Carbohydrates
Fiber from hay provides slow-release energy. Avoid high-starch grains in excess to prevent colic or laminitis.
Vitamins and Minerals
Key minerals: calcium, phosphorus (ratio 2:1), magnesium, zinc, and copper. Vitamins A, D, and E are often added in supplements.
Toxic Foods and Ingredients
- Moldy hay: Contains mycotoxins that cause respiratory issues.
- Ionophore antibiotics (e.g., monensin): Lethal to horses.
- High-starch grains (spoiled): Risk of colic.
- Chocolate, caffeine, avocado: Toxic.
- Brassicas (cabbage, kale): Cause gas and colic in large amounts.
Water Intake
Adult horses require 5-10 gallons of clean water daily, increasing with heat or work. Provide constant access.
Beneficial Supplements
- Probiotics: Support gut health after antibiotic use.
- Joint supplements (glucosamine, MSM): For older or working horses.
- Vitamin E/selenium: For horses on poor-quality hay.
Feeding Differences by Age
Foals (0-6 months)
Milk-based diet, introduce creep feed at 2-3 months. Small, frequent meals.
Weanlings (6-12 months)
Gradually transition to forage and concentrates. Need 14-16% protein.
Yearlings to 2-year-olds
Slowing growth, 12-14% protein. Careful with starch to avoid developmental issues.
Adult (3-20 years)
As described.
Senior (20+ years)
Often need easily digestible fiber (soaked hay cubes), higher fat, and added vitamins. May require mash feeds if dental issues present.
Signs of Healthy vs. Unhealthy Diet
| Healthy | Unhealthy |
|---|---|
| Shiny coat, bright eyes | Dull coat, dry skin |
| Consistent manure (moist but formed) | Loose or hard manure |
| Ideal body condition (ribs easily felt but not visible) | Overweight or underweight |
| Good energy, even mood | Lethargy, irritability |
| Clean hooves, healthy growth | Cracked hooves, laminitis |
Monitor weight weekly and adjust feed if needed. Consult a veterinarian or equine nutritionist for personalized plans.