Introduction
Horses are grazing animals that thrive on a consistent feeding routine. A well-planned feeding schedule supports digestive health, prevents colic, and maintains optimal body condition. This guide covers essential aspects of equine nutrition, including diet types, portion control, nutrient requirements, and feeding frequency.
Recommended Diet Types
Horses can be fed a combination of forages, concentrates, and supplements. The main diet types include:
- Forage-based diet: Grass hay, legume hay (alfalfa), or pasture. Forage should make up at least 50-70% of the diet.
- Complete feed: Pelleted or extruded feeds that contain both forage and concentrates, suitable for horses with dental issues or limited hay access.
- Concentrates: Grains (oats, corn, barley) or commercial grain mixes, fed to provide additional energy for active horses.
- Balancers: Low-calorie pellets fortified with vitamins and minerals, ideal for easy keepers on forage-only diets.
- Supplements: Targeted products for joint health, hoof growth, or specific deficiencies.
Portion Sizes and Daily Calorie Needs
Daily feed intake depends on the horse's weight, age, activity level, and metabolism. Use the following table as a general guideline:
| Horse Type | Body Weight (lbs) | Daily Hay (lbs) | Daily Grain (lbs) | Calories (Mcal/day) |
|---|---|---|---|---|
| Maintenance (light work) | 1,000 | 15-20 | 0-2 | 16-18 |
| Light work | 1,000 | 15-20 | 2-4 | 18-22 |
| Moderate work | 1,000 | 15-20 | 4-6 | 22-26 |
| Heavy work | 1,000 | 15-20 | 6-8 | 26-30 |
| Pregnant mare (last 3 months) | 1,200 | 18-22 | 4-6 | 24-28 |
| Lactating mare | 1,200 | 18-22 | 6-8 | 30-34 |
| Weanling (6 months) | 500 | 5-8 | 3-5 | 12-16 |
| Yearling | 800 | 10-14 | 4-6 | 16-20 |
| Senior (over 20) | 1,000 | 15-20 | 2-4 | 18-20 |
Adjust portions based on body condition score (BCS). Ideally, horses should have a BCS of 5–6 (on a 1–9 scale).
Feeding Frequency and Timing
Horses should be fed small meals multiple times a day to mimic natural grazing. Recommended schedule:
- Forage: Offer hay free-choice or at least 3–4 times daily. If limited, provide a minimum of 1.5% of body weight in hay per day.
- Concentrates: No more than 0.5% of body weight per meal (e.g., 5 lbs for a 1,000 lb horse). Feed 2–3 times daily, ideally at the same times each day.
- Water: Always available, with at least 10–15 gallons per day.
Consistency is key. Feed at the same times daily (e.g., 7 AM, 12 PM, 5 PM) to maintain digestive health.
Essential Nutrients
- Protein: Required for muscle and tissue repair. Most mature horses need 10–12% crude protein; growing foals and lactating mares need 14–16%.
- Fat: Provides concentrated energy. Feed 3–10% of diet; higher fat (up to 20%) for performance horses.
- Carbohydrates: From fiber (hay) and starch (grains). Avoid excessive starch to prevent colic and laminitis.
- Vitamins: Vitamin A (carotene from green forage), D (sunlight), E (antioxidant), and B-complex (synthesized in hindgut, but may need supplementation in stressed horses).
- Minerals: Calcium, phosphorus (ratio 1.5:1 to 2:1), magnesium, potassium, sodium, chloride, and trace minerals (copper, zinc, selenium).
Toxic or Harmful Foods
- Moldy or dusty hay – can cause respiratory issues or colic.
- Grain overload – too much grain at once can cause laminitis or colic.
- Certain plants: Oak leaves (tannins), red maple leaves (toxicity), yew, oleander, and ragwort (liver damage).
- Avocado: Contains persin, which is toxic to horses.
- Chocolate, caffeine, alcohol – can cause cardiac issues.
- Onions, garlic (in large amounts) – can damage red blood cells.
- Fruit seeds (apple, pear) – contain cyanide, but small amounts unlikely to be harmful; remove seeds.
Water Intake Recommendations
Horses require 10–15 gallons (38–57 liters) of fresh, clean water daily. Increase to 20 gallons or more during hot weather or heavy exercise. Provide water at room temperature (45–65°F) in winter to encourage consumption. Monitor intake; dehydration can lead to colic.
Beneficial Nutritional Supplements
- Probiotics and prebiotics: Support gut health, especially during stress or after antibiotics.
- Joint supplements: Glucosamine, chondroitin, MSM – for arthritic or performance horses.
- Hoof supplements: Biotin, methionine, zinc – strengthen hooves.
- Electrolytes: Replenish salts lost through sweat during intense exercise or heat.
- Vitamin E: For horses without pasture access (deficiency can cause muscle problems).
- Omega-3 fatty acids: From flaxseed or fish oil, reduce inflammation.
Always consult a veterinarian before adding supplements.
Feeding Differences: Foals, Adults, and Seniors
Foals (0–1 year)
Nurse from mare until 4-6 months. Start creep feed (16-18% protein) at 2-3 months. Wean gradually. Feed small, frequent meals: 3-4 times daily.
Adults (1–20 years)
Maintain balanced diet based on workload. Provide forage first, then concentrate. Divide concentrate into 2-3 meals.
Seniors (20+ years)
May have dental issues; offer soaked hay cubes, complete feeds, or haylage. Increase protein (14-16%) to prevent muscle loss. Feed smaller, softer meals more frequently. Monitor body condition closely.
Signs of Healthy vs. Poor Nutrition
Healthy Nutrition
- Shiny coat, bright eyes, good hoof quality.
- Consistent appetite and regular manure (6-10 piles per day).
- Ideal body condition score (5-6) with visible ribs covered by fat.
- Energetic, alert, and willing to work.
Poor Nutrition
- Dull, rough coat; hair loss or poor shedding.
- Lethargy, weight loss or gain, poor muscle tone.
- Hoof cracks, slow hoof growth.
- Frequent colic, diarrhea, or constipation.
- Picky eating or wood chewing (boredom or nutrient deficiency).
If signs of poor nutrition appear, consult with an equine nutritionist or veterinarian.