Last updated: December 28, 2025
Disclaimer: Educational Framework Only
Consult your veterinarian before making any significant nutritional changes, especially for senior horses, rescues, or those with a complex medical history. Rapid dietary shifts carry a significant risk of colic and laminitis.
💡 What to Feed a Skinny Horse (Quick Answer)
For most underweight horses, build rations in this specific order:
- Free-choice grass hay foundation (The bulk of the diet)
- Controlled alfalfa mix (For quality protein and extra calories)
- Low-starch fiber (Beet pulp or hay pellets)
- Added fat (Stabilized rice bran or oils)
- Senior/performance feeds (Only when forage alone falls short)
Feeding a skinny horse isn’t about dumping grain in a bucket—it’s choosing the right forage, fiber, fat, and commercial feeds so every pound works toward safe, steady gain. This is step 3 in your weight-gain system: it assumes your vet has ruled out medical causes (teeth, parasites, ulcers) from the causes article and you’ve set BCS targets using the plan article.
💡 Curious how she looks now? Scroll down to see her transformation after three months of targeted feeding and digestive support.
Table of Contents
Quick Reference: Best Feed Options
| Feed Type | Main Benefit | How to Use Safely |
|---|---|---|
| Alicia Bermuda | Palatable grass hay base | Free-choice; 70-100% of diet |
| Alfalfa | Protein + calorie boost | Mix 20-30% with grass hay |
| Beet Pulp | Gut-friendly energy, low starch | Soak always; 2-4 lb/day split meals |
| Rice Bran | High fat (2.25x carbs), vit E | Gradual intro over 2 weeks |
| DAC DDA | Gut health, nutrient uptake | Post-stress/deworming; vet-guided |
Swipe left/right to view full table on mobile.
Amounts and suitability vary by horse; use this table as a comparison guide, not a feeding prescription.
Build the Forage Foundation First
Forage provides 70-100% of calories safely through hindgut fermentation. Without it, even premium feeds fail.
Grass Hay as the Base
Alicia Bermuda (a soft, leafy Bermudagrass common in the southern U.S.), Timothy, or Orchardgrass forms the core. Target 1.5-2% body weight daily (20-25 lb for 1,000 lb horse), increasing to 2-2.5% as tolerated—Kentucky Equine Research. Free-choice keeps gut rhythm steady; many horses gain immediately on measured, quality grass hay.
Smart Use of Alfalfa
Alfalfa adds calories/protein but avoid as sole forage (imbalances risk). Mix 20-30% flakes with grass hay for:
- High-energy needs (OTTBs)
- Ulcer buffering (calcium-rich)
- Protein boost without excess starch
Hay-Feeding Tips
- Hay before grain (saliva buffers acid)
- Slow-feed nets prevent waste/bullying
- Multiple stations for herd dynamics
Concentrates and Commercial Feeds (Use with Care)
Layer these after forage base for performance/seniors.
Grains in Moderation
Oats/corn/barley add calories but spike starch risk. Limit to:
- Small meals (<2 lb/feeding)
- 7-10 day intro
- Never replace hay
Senior Feeds
For worn teeth/low efficiency: beet pulp base, added fat/prebiotics.
Brand examples are provided for familiarity only, not endorsement; comparable products may be substituted based on veterinary guidance.
Example: Purina Equine Senior
- Protein 14%, Fat 7%, Fiber 14%
- Replaces hay if severe dental issues
- Soak 10-15 min; small frequent meals
Senior feeds guide
Performance Feeds
10-12% fat, 12-14% protein for workhorses. Split 2-3 meals; forage always first. Racehorse nutrition
Add Fiber and Fat for Extra Calories
Gut-safe boosts before more starch.
Digestible Fiber Boosters
- Soy hulls/hay pellets: Picky eaters/poor teeth
- Beet pulp: Oat calories, low starch, hydrates. Soak; 2-4 lb split meals
Fat for Efficient Calorie Loading
Fat = 2.25x carb energy/lb. Slow intro 7-14 days.
| Oil Source | Calories/lb | Omega-3 Content | Best For… |
|---|---|---|---|
| Flax (Linseed) Oil | ~4,000 | High (Anti-inflammatory) | Show coat, skin health, and joint support. |
| Rice Bran Oil | ~3,600 | Moderate (Balanced) | Weight gain + “Gamma Oryzanol” for muscle. |
| Coconut Oil | ~4,000 | None (MCT focus) | Quick energy, gut health (antimicrobial). |
| Corn Oil | ~4,000 | Very Low (Pro-inflammatory) | Strict budget-friendly max calories. |
*Note: All pure oils contain approx. 120-130 calories per tablespoon.
Rice Bran Protocol (1,000 lb horse):
- Week 1: ¼ cup/day
- Week 2: ½ cup/day
- Week 3: 1 cup/day
- Week 4+: 1-2 lb/day split meals (vet-confirm upper limits)
Mix warm water mash; horses love it.
Support the Gut So Feed Works
Probiotics/Prebiotics
Boost microbiome post-stress/deworming. DAC DDA + probiotic improved my mare’s uptake/manure/weight.
Enzymes for Seniors
Break down nutrients in compromised guts.
Vet/Nutritionist Role
Fine-tune based on BCS/manure. Diagnostics/plans covered elsewhere.
Sample Feeding Plans for Skinny Horses
Match any ration changes to the weekly checkpoints in How to Put Weight on a Horse to avoid digestive overload. Examples only—vet-confirm.
Adult Idle (BCS 3-4, 1,000 lb)
- Hay: 20-25 lb Alicia Bermuda free-choice
- Alfalfa: 2-4 lb mix
- Beet pulp: 2 lb soaked split
- Rice bran: ½-1 lb ramped
OTTB/Performance
- Hay + alfalfa free-choice
- Performance feed: 4-6 lb split 3 meals
- Oil/flax: 2-4 oz
- Ulcer watch: no empty stomach >4 hr
Dental-Compromised Senior
- Soaked senior feed: 12-16 lb (replaces hay)
- Hay pellets/beet pulp: 4-6 lb soaked
- 4-5 small meals/day
Volumes are approximate; weight is preferred when possible.
Common Feeding Pitfalls to Avoid
Dangerous Changes
- Overnight grain doubling (colic)
- Free-choice concentrates (gorge risk)
- No 7-10 day transitions
Hidden Issues
- Inconsistent times (stress)
- Bullying at feeders
- Undigested manure fibers (dentals)
When NOT to Add More Feed
If your horse shows reduced appetite, loose manure, girthiness, or no weight gain after 4–6 weeks, adding more calories is unlikely to help. Revisit dental exams, ulcers, parasites, and pain before changing the ration.
Frequently Asked Questions About Feeding Skinny Horses
How much should I feed a skinny horse to gain weight?
Feed 1.5% to 2.5% of your horse’s body weight in forage daily. For a 1,000 lb horse, that’s 15–25 lbs of hay. Add concentrates or fat as needed, and monitor body condition score regularly. Consult an equine nutritionist for a tailored plan.
What is the best feed for weight gain in horses?
Top options include grass hay (like Alicia Bermuda), alfalfa (in moderation), soaked beet pulp, stabilized rice bran, flaxseed, and high-quality senior or performance feeds. These provide digestible calories and support gut health.
How fast should a skinny horse gain weight?
Aim for 0.5 to 1 lb of weight gain per day. Results vary by horse, but slow and steady progress is safest. Track body condition and weight tape weekly to stay on target.
What else helps a skinny horse gain weight besides feed?
In addition to feed, support weight gain with dental care, deworming, vet checkups, stress management, and a consistent feeding schedule. Health and environment matter as much as calories.
Why isn’t my horse gaining weight even with more feed?
If increased feeding doesn’t help, check for hidden issues like dental problems, parasites, ulcers, or chronic illness. A veterinary exam can identify underlying causes and guide next steps.
Final Thoughts: A Journey of Observation and Adaptation
🐎 Your horse’s weight gain journey is a marathon, not a sprint. Stay consistent, measure often, and always adapt as needed.
Have you faced a challenge feeding a skinny horse? Drop your story in the comments—we’d love to learn from your experience.
About Miles Henry
Racehorse Owner & Author | 30+ Years in Thoroughbred Racing
Miles Henry (legal name: William Bradley) is a Louisiana-licensed owner
#67012.
Beyond the racetrack, he’s cared for Quarter Horses, Friesians, Paints, and trail mounts for 30+ years—bringing hands-on experience to every breed profile, health guide, and gear review on this site.
His racehorses have finished in-the-money in
30 of their last 90 starts
Equibase Profile.
Connect: