Understanding Equine Forage Basics
Forage—hay, pasture, haylage—should form the foundation of every horse's diet, making up at least 50% of daily intake by weight. Horses are hindgut fermenters, relying on fibrous plant material for digestive health and behavioral well-being. A common mistake is feeding too much concentrate (grain) and not enough forage. Aim for 1.5-2% of the horse's body weight in forage daily (e.g., 15-20 lbs for a 1000 lb horse).
Types of Forage
- Grass hay (timothy, brome, orchard grass): lower protein and calories, ideal for easy keepers and maintenance.
- Legume hay (alfalfa, clover): higher in protein, calcium, and energy; good for growing, lactating, and hard-working horses, but can be too rich for some.
- Mixed hay: a blend of grass and legume, offering balanced nutrition.
- Pasture: fresh, growing grass; nutrient content varies by season. Introduce gradually to prevent laminitis.
- Haylage (wrapped hay): higher moisture, palatable; good for horses with respiratory issues but must be managed to avoid spoilage.
Forage Combination Strategies
Combining different forages can balance nutrients. For example, mix grass hay with a small amount of alfalfa to boost protein for a growing horse without overdoing calcium. For an overweight horse, use lower-quality grass hay and limit legume. Always provide forage free-choice or in small frequent meals to mimic natural grazing.
Feeding Amounts by Age, Size, and Workload
| Horse Type | Body Weight (lbs) | Daily Forage (lbs) | Additional Concentrates (if needed) |
|---|---|---|---|
| Maintenance (adult, light work) | 1000 | 15-20 | 0-4 lbs grain |
| Growing foal (6-12 mo) | 500 | 8-10 | 4-6 lbs growth feed |
| Lactating mare | 1200 | 20-24 | 8-12 lbs concentrates |
| Heavy work (race, eventing) | 1100 | 16-18 | 6-10 lbs high-energy feed |
| Senior horse (poor dentition) | 1000 | 12-16 (soaked hay or hay cubes) | Senior feed as needed |
Feeding Frequency and Schedule
Horses should have access to forage throughout the day. Ideally, feed hay 3-4 times daily if stalled. Pasture turnout (12+ hours) is best. Meals should be consistent; sudden changes cause colic. Divide concentrate rations into 2-3 smaller meals per day.
Essential Nutrients
- Protein: 10-14% for most, up to 16% for growth/lactation. Amino acids lysine and methionine are critical.
- Fat: 3-8% of diet; added fat (vegetable oil, rice bran) boosts energy without starch.
- Carbohydrates: from fiber (forage) and starch (grains). Limit starch to <2 lbs grain per meal to avoid metabolic issues.
- Vitamins: A, D, E (antioxidant), B vitamins (synthesized in hindgut).
- Minerals: Calcium, phosphorus (ratio 2:1), magnesium, selenium, copper, zinc. Provide a balanced mineral supplement if forage is deficient.
Toxic Foods and Ingredients
Avoid: chocolate, avocado, wilted maple leaves, moldy hay (can cause respiratory issues or mycotoxins), high-nitrate plants, and any grain that is moldy. Certain weeds (ragwort, oleander) are deadly. Also avoid excessive sugars from treats.
Water Intake
Horses need 5-10 gallons (20-40 L) of clean, fresh water daily, more in heat or when working. Provide heated water in winter to encourage drinking. Dehydration leads to impaction colic.
Supplements
- Probiotics: for digestive support after antibiotics or stress.
- Joint supplements: glucosamine, chondroitin, MSM for older or arthritic horses.
- Electrolytes: replace losses in sweat for heavy exercise.
- Vitamin E and selenium: especially if hay is stored long-term.
- Beet pulp: adds fiber and moisture; soak before feeding.
Life Stage Feeding Differences
Foals: start creep feeding at 2-3 months; ensure 0.5-1% body weight in concentrates. Wean at 4-6 months. Forage should be high-quality and soft.
Adults: adjust based on work. Easy keepers need low-calorie forage; hard keepers may need more grain or fat.
Seniors: poor teeth require soaked hay cubes/pellets, beet pulp, or complete feeds. Increase protein (14-16%) and fat for weight maintenance. Monitor for dental issues.
Signs of Healthy vs. Poor Diet
Healthy: shiny coat, bright eyes, consistent body condition score (5-6/9), regular manure (formed but moist), good energy levels, calm demeanor.
Poor: dull coat, weight loss/gain, lethargy, diarrhea or hard dry manure, picky eating, hoof problems. Poor diet can lead to ulcers, colic, laminitis, or tie-up.
Always introduce dietary changes gradually over 7-10 days. Consult an equine nutritionist for tailored plans, especially for horses with metabolic disorders like PPID or EMS.