Introduction to Free-Choice Feeding
Free-choice feeding, also known as ad libitum feeding, provides horses with constant access to forage or concentrate feeds. This method mimics natural grazing patterns and can benefit horses with high energy needs or those prone to ulcers. However, it demands careful management to avoid health issues such as obesity, metabolic disorders, and nutrient imbalances.
Recommended Feed Types
For free-choice feeding, the primary feed should be high-quality forage (hay or pasture). Concentrates (grains) are generally not suitable for free-choice feeding due to risk of overconsumption and colic. If concentrates are used, they should be limited to specific amounts. Always provide fresh, clean water alongside free-choice forage.
- Forage: Grass hay (timothy, orchardgrass) or legume hay (alfalfa) in moderation. Legume hay is higher in protein and calcium.
- Pasture: Ideal for horses at maintenance or light work, but monitor for lush grass that can trigger founder.
- Complete feeds: Some specially formulated pelleted feeds are designed for free-choice feeding, but follow manufacturer guidelines.
Portion Sizes and Daily Caloric Needs
Horses on free-choice forage typically consume 1.5-2% of their body weight in dry matter per day. For a 500 kg horse, that's 7.5-10 kg of hay. Caloric needs vary by age, size, and activity:
| Horse Type | Body Weight (kg) | Daily Calories (Mcal DE) |
|---|---|---|
| Maintenance (adult, idle) | 500 | 16-20 |
| Light work | 500 | 20-25 |
| Moderate work | 500 | 25-30 |
| Lactating mare | 500 | 28-33 |
| Weanling (6 months) | 250 | 12-15 |
Feeding Frequency and Timing
Free-choice feeding means horses have continuous access to feed. However, it's essential to provide fresh hay at least twice daily to prevent the feed from becoming stale or moldy. Automatic feeders or large hay nets can help maintain constant availability. Monitor consumption to ensure the horse is not overeating.
Essential Nutrients
Horses require balanced amounts of protein, fats, carbohydrates, vitamins, and minerals. Free-choice forage usually meets maintenance needs, but additional supplementation may be necessary for working horses or those with higher demands.
- Protein: 8-12% for maintenance; 14-16% for growth or lactation.
- Fats: 2-5% of diet. Vegetable oils can provide extra energy.
- Carbohydrates: Main energy source from fiber (forage) and starches (grains). Limit starch to avoid colic.
- Vitamins and Minerals: Ensure adequate vitamin A, E, selenium, copper, and zinc. A balanced mineral salt block is recommended.
Toxic or Harmful Foods
Avoid free-feeding the following: moldy hay, clover with mold (slaframine), wilted maple leaves (hypoglycin A), grain overload, and any feed with high levels of non-structural carbohydrates for horses prone to laminitis. Also, keep horses away from toxic plants like ragwort, bracken fern, and yew.
Water Intake Recommendations
Horses on free-choice hay need 25-30 liters of water per day for maintenance, more in hot weather or with work. Provide clean, fresh water at all times. Check water sources regularly in winter to prevent freezing.
Beneficial Supplements
If the forage quality is poor or the horse has specific needs, consider:
- Salt block: Free-choice access to a plain or mineralized salt block.
- Probiotics: May support digestive health, especially during stress or after antibiotics.
- Joint supplements: Glucosamine and chondroitin for older horses.
- Vitamin E and selenium: Important for horses on hay-only diets without pasture.
Feeding Differences by Life Stage
Foals and Weanlings: Require higher protein and calcium for growth. Free-choice creep feed can be offered, but monitor to prevent obesity. Mare's milk provides initial nutrients, then transitioning to high-quality forage and starter feed.
Adults: Maintenance or performance diets. Free-choice hay is ideal, but adjust concentrate feeding based on work level. Regular body condition scoring helps prevent overfeeding.
Seniors: Aging horses may have dental issues and reduced digestion. Soaked hay cubes, senior feeds, or pelleted complete feeds can be used free-choice. Ensure easy access to feed and water.
Signs of Healthy vs. Poor Diet
Healthy: Shiny coat, bright eyes, consistent energy, normal manure, ideal body condition score (4-5 on 9-point scale). Hooves are strong and grow evenly.
Poor: Dull coat, weight loss or gain, lethargy, diarrhea or constipation, hoof problems, increased infections. Signs of overconsumption include cresty neck, lumpy fat pads (obesity), and lameness (founder).