Understanding Your Horse’s Nutritional Needs
Horses are herbivores with a digestive system designed for continuous grazing. Their diet should be primarily forage-based (hay or pasture) with supplemental concentrates as needed. Proper nutrition supports energy, growth, reproduction, and overall health.
Recommended Feed Types
- Forage (Hay/Pasture): The foundation of any horse diet. Good quality grass hay (timothy, orchard grass, brome) or legume hay (alfalfa) provides fiber and essential nutrients.
- Concentrates (Grains & Pellets): Used to supplement energy and protein when forage alone is insufficient. Common grains include oats, corn, and barley. Pelleted or extruded feeds offer balanced nutrition.
- Commercial Complete Feeds: These provide all necessary nutrients in one product, including forage replacement. Ideal for horses with dental issues or limited hay access.
- Supplements: Used to address specific deficiencies or support health (e.g., joint, hoof, coat).
Feed Quantities by Age, Size, and Activity
| Category | Daily Dry Matter Intake (% of Body Weight) | Daily Calories (approx.) |
|---|---|---|
| Maintenance (idle adult) | 1.5-2% | 15,000-20,000 kcal |
| Light work (1-2 hrs/day) | 1.5-2.5% | 20,000-25,000 kcal |
| Moderate work | 2-2.5% | 25,000-30,000 kcal |
| Intense work | 2.5-3% | 30,000-40,000 kcal |
| Pregnant/lactating mare | 2-3% | 20,000-35,000 kcal |
| Growing foal (6-12 mo) | 2.5-3% | 20,000-30,000 kcal |
| Senior (over 20 yrs) | 1.5-2.5% | 15,000-25,000 kcal |
Note: A 1,000 lb horse needs about 15-20 lbs of hay per day. Adjust based on body condition and workload.
Feeding Frequency and Schedule
Horses should be fed at least twice daily, ideally three to four times for consistent nutrient intake. Provide forage first, then concentrates. Allow at least 1 hour between feeding and exercise to prevent colic. Fresh, clean water must always be available.
Essential Nutrients
- Protein: For muscle growth and repair. Quality sources: alfalfa, soybean meal. Need varies from 8-16% crude protein in diet.
- Fats: Concentrated energy source (up to 10% diet). Vegetable oils (corn, flaxseed) improve coat condition.
- Carbohydrates: Provide energy through fiber (forage) and starch (grains). Avoid excessive starch to prevent laminitis.
- Vitamins: Vitamins A, D, E, and B-complex. Fresh pasture provides most, but hay may lack vitamin E.
- Minerals: Calcium, phosphorus, magnesium, potassium, sodium, chloride, and trace minerals (copper, zinc, selenium). Ensure correct Ca:P ratio (1.5:1 to 2:1).
Toxic and Harmful Foods
- Moldy hay or grain: Can cause colic, respiratory issues, or even death. Avoid hay with dust or mold.
- Certain plants: Ragwort, bracken fern, yew, oleander, red maple leaves (toxic). Remove from pastures.
- Grain overload: Too much grain can lead to laminitis or colic. Introduce changes gradually over 7-10 days.
- High sugar feeds: Avoid for horses with metabolic syndrome or Cushing’s disease. Limit molasses, sweet feeds.
- Chocolate, caffeine, avocado: Toxic to horses. Never feed these.
Water Intake Recommendations
An adult horse drinks 5-10 gallons (20-40 liters) of water daily, more in hot weather or with heavy work. Ensure water is clean, free of ice in winter, and at comfortable temperature. Use automatic waterers or buckets that are cleaned regularly.
Beneficial Supplements
- Probiotics and prebiotics: Support gut health during stress or after antibiotics.
- Joint supplements: Glucosamine, chondroitin, MSM for older horses or those in work.
- Hoof supplements: Biotin, methionine, zinc for strong hooves.
- Electrolytes: Added to water or feed for horses that sweat heavily.
- Vitamin E & selenium: Important for horses on hay without fresh pasture.
- Garlic or peppermint: Natural fly deterrents (use cautiously, avoid excessive garlic).
Feeding Differences: Young, Adult, and Senior Horses
Foals and Weanlings
Foals nurse immediately; introduce creep feed (high protein, balanced minerals) at 2-3 months. Provide free-choice hay. Weaned foals need 14-16% protein. Avoid overfeeding to prevent developmental orthopedic disease (DOD).
Adult Horses
Maintenance diet: quality hay + possible concentrate if underweight or working. Monitor body condition score (BCS) 5-6/9. Adjust feed to maintain ideal weight.
Senior Horses
Aging teeth may require soaked hay cubes, pelleted feeds, or beet pulp. Increase protein (14-16%) to maintain muscle. Provide joint support and easy-to-chew feeds. Ensure adequate vitamin and mineral intake.
Signs of a Healthy vs. Unhealthy Diet
Healthy: Shiny coat, bright eyes, steady weight, good appetite, firm manure, and energetic demeanor. Hooves are strong and grow evenly.
Unhealthy: Dull coat, weight loss or obesity, lethargy, diarrhea or constipation, excessive gas, cribbing or wood chewing (possibly nutrient deficiency), poor hoof quality. If you notice these, consult a veterinarian or equine nutritionist.