As a dedicated horse caregiver, you know the intricate balance required to keep your equine partners thriving. Whether it’s supporting a senior horse, boosting performance in an athlete, or simply helping a hard-keeper maintain condition, providing the right nutritional support is paramount. Fat supplements play a crucial role, offering concentrated calories and essential fatty acids that can transform their health from the inside out.
Iām Mo Mahin ā the founder and writer behind Furric. My 15+ years as an equine behaviorist and nutrition enthusiast are grounded in rigorous analysis of veterinary research, deep dives into ingredient safety standards, and careful evaluation of feedback from countless experienced horse owners and barn managers across the globe.
To simplify your search and ensure your equine friend receives optimal nourishment, this guide provides deeply researched recommendations to help you discover the best fat supplement for horses tailored to their unique health and performance requirements.
How To Choose The Best Fat Supplement For Horses
Selecting the ideal fat supplement for your horse involves more than just looking at the calorie count. It’s about understanding the specific nutritional needs of your equine companion, considering their age, activity level, and any underlying health conditions. Here’s what to keep in mind:
Understanding Energy Sources
Different fat sources offer varying benefits. While all provide concentrated calories, some, like flaxseed or camelina oil, are rich in Omega-3 fatty acids, crucial for anti-inflammatory support and overall cellular health. Others, like rice bran or dry fat, offer a “cool” energy source, providing stamina without causing excitability. Consider your horse’s temperament and energy requirements when evaluating the fat source.
Ingredient Quality & Digestibility
High-quality ingredients ensure better absorption and fewer digestive upsets. Look for supplements with easily digestible fats and, ideally, added probiotics or prebiotics to support gut health. Avoid products with excessive fillers, artificial flavors, or high sugar content, especially for horses with metabolic concerns. The form (liquid, powder, pellet) can also impact palatability and ease of feeding.
Palatability & Administration
Even the most effective supplement is useless if your horse won’t eat it. Many fat supplements are designed to be highly palatable, often with flavors like alfalfa or a neutral taste that blends seamlessly with feed. Liquid supplements may require a pump for accurate dosing, while powders and pellets can be easily mixed into grain. Always introduce new supplements gradually to allow your horse to adjust.
Quick Comparison
On smaller screens, swipe sideways to see the full table.
| Model | Type | Best For | Key Feature | Amazon |
|---|---|---|---|---|
| Equinety Ultimate OEC | Liquid | Overall Wellness | Vet-approved, no fillers | Amazon |
| Horse Guard Super Weight Gain | Granule | Hard Keepers | 3-in-1 formula (fat, probiotics, vitamins) | Amazon |
| Farnam Weight Builder | Powder | Calm Energy | 50% fat, no added sugar | Amazon |
| Smart Earth Camelina Oil | Oil | Natural Omega-3 | 100% pure cold-pressed camelina oil | Amazon |
| Equinety Horse XL | Powder | Muscle & Recovery | Amino acids for cellular repair | Amazon |
| DAC Oil Gallon Jug | Liquid | Multi-Benefit | Supports skin, joints, weight, gut | Amazon |
| Manna Pro Weight Accelerator | Dry | Senior Horses | Tailored for aging horses with probiotics | Amazon |
| Manna Pro Cool Calories 100 | Dry | Budget-Friendly Weight Gain | 99% fat for cool, focused energy | Amazon |
| Kentucky Equine Research EO-3 | Liquid | Targeted Omega-3 | DHA and EPA from fish oil | Amazon |
InāDepth Reviews
1. Equinety Ultimate OEC
The Equinety Ultimate OEC stands out as a superior choice for comprehensive equine wellness, offering a powerful blend of Omega 3 fatty acids, Vitamin E, and flaxseed oil. This vet-approved liquid supplement is meticulously formulated to support a wide range of needs, from enhancing coat defense and joint health to aiding muscle recovery and overall immune function. Itās designed without common fillers like starches, soy, or sugar, making it a clean and effective option for all types of horses and ages.
Experienced equestrian professionals and dedicated horse owners consistently highlight its impact on their animals’ vitality. Many have observed significant improvements in their horses’ performance, noting how it contributes to quicker recovery post-exercise and helps maintain lower stress levels. For senior horses, specifically, this supplement is praised for adding healthy fat and weight without causing excessive energy, a common concern with other high-calorie feeds. The natural Vitamin E and flax oil are frequently mentioned for promoting exceptionally shiny coats and healthier hooves.
Administering this supplement is straightforward; simply mix 60 ml daily with your horseās regular feed. Its unflavored nature ensures palatability for even the pickiest eaters, seamlessly integrating into daily routines without the need for a loading dose. If you’re seeking a premium, multi-faceted fat supplement that delivers on its promises for overall health, joint support, and a radiant appearance, the Equinety Ultimate OEC is an excellent investment for your horse’s long-term well-being.
Why we love it
- Vet-approved, comprehensive formula
- Supports joints, gut, skin, coat, muscle
- No starches, soy, fillers, or sugar
- Helps with recovery and stress reduction
Good to know
- Higher price point
- Goes quickly with daily use
2. Horse Guard Super Weight Gain
The Horse Guard Super Weight Gain is a robust 3-in-1 formula designed to provide total support for horses needing an extra boost. Combining full-fat extruded soybeans, a powerful probiotic blend, and Horse Guardās essential vitamin-mineral package, this supplement tackles weight gain, coat health, and digestion simultaneously. Itās particularly effective for hard keepers, senior horses, and those in recovery, promoting safe and healthy weight gain alongside improved energy and topline development.
Horse owners with challenging cases, such as senior horses struggling to maintain condition through harsh winters or ex-racehorses prone to weight loss, consistently report miraculous transformations. Many have found this to be the most effective supplement after trying numerous alternatives, noting fast results and sustained weight maintenance. The extruded soy is specifically praised for enhancing coat shine and overall skin health, giving horses a visible glow thathelps them look and feel their best. The added prebiotics and probiotics are also frequently cited for significantly improving gut health and nutrient absorption.
With an easy-to-dose granule form and a scoop included, this supplement is simple to incorporate into daily feeding routines. While some note that it’s a generous amount to feed, most horses readily accept the taste. For any horse needing comprehensive support for weight, digestion, and coat, this trusted formula from Horse Guard offers visible, reliable results, making it a staple for many equine care programs.
Why we love it
- 3-in-1 formula for holistic support
- Visible results for hard keepers and seniors
- Boosts coat shine and skin health
- Contains prebiotics and probiotics for digestion
Good to know
- Large serving size per dose
- Bag can go stale if not stored properly
3. Farnam Weight Builder
Farnam Weight Builder is a highly effective supplement designed to help horses maintain optimal body condition and weight, particularly beneficial for those needing a calm energy source. With a robust 50% fat content, this nutritionally balanced formula provides more calories than equivalent weights of grain, allowing for less volume to be fed. It delivers easily digestible calories with no added sugar, mitigating the risk of digestive upset often associated with increased grain intake.
Horse caregivers, especially those with older mares or rescue horses, consistently praise its ability to pack on pounds and maintain condition. Many have successfully used it to help 20- and 30-year-old horses regain and sustain a healthy weight, noting dramatic improvements. The inclusion of omega-3 fatty acids from flaxseed meal and heat-stabilized rice bran contributes significantly to healthy skin and a glossy coat, transforming horses from “drab to dashing” as one owner enthusiastically described. The palatable alfalfa flavor ensures easy acceptance, even by picky eaters.
This powder mixes effortlessly with a horseās regular grain ration, making daily administration simple and stress-free. It provides a steady, calming energy, ideal for performance horses needing sustained stamina without jitters. If your goal is to safely add calories, improve coat quality, and support rigorous performance demands without digestive issues, Farnam Weight Builder offers a reliable and palatable solution for consistent weight management and overall equine vitality.
Why we love it
- 50% fat for concentrated calories
- No added sugar, safe for digestion
- Omega-3s for skin and coat health
- Provides calming, sustained energy
Good to know
- Some users found it better for stamina than rapid gain
- 30-day supply may require frequent repurchase
4. Smart Earth Camelina Oil
Smart Earth Camelina Oil offers a pure, natural, and highly beneficial omega-3 supplement for horses, grown and made in Canada. This cold-pressed, non-GMO “false flax oil” provides an ideal ratio of omega-3 to omega-6 fatty acids, making it an excellent anti-inflammatory support. With zero fillers and only one powerful ingredient ā camelina oil ā it ensures precision dosing and a clean, natural boost to your horse’s diet.
Rescue horse parents and owners of older Arabians have reported remarkable improvements, with horses appearing years younger in movement and looks. Many have seen significant weight gain in emaciated rescue horses and a dramatic increase in coat shine, softness, and overall health. Beyond weight and coat, this oil is praised for its quality nutrients that support ulcer and arthritis management, mood stability, and general vitality. The natural vitamin E and antioxidants further contribute to its beneficial profile, making it a multifaceted addition to any feed program.
Simply adding this tasty top dressing over normal horse feed makes it incredibly easy to use. While some users noted that a pump isn’t included, the benefits far outweigh this minor inconvenience. For those seeking a truly natural, high-quality oil to enhance their horse’s health, weight, and appearance, Smart Earth Camelina Oil is a fantastic choice, delivering comprehensive support from a single, pure source.
Why we love it
- 100% pure, cold-pressed camelina oil
- Ideal omega-3 to omega-6 ratio for anti-inflammatory support
- Supports weight gain, coat, joints, and mood
- Natural vitamin E and antioxidants
Good to know
- Does not include a pump for dispensing
- Higher price point
5. Equinety Horse XL
Equinety Horse XL is a high-performance equine nutrition supplement focused on cellular repair and overall health through a proprietary blend of branched essential amino acids. As the building blocks of protein, these amino acids are crucial for muscle repair, strength, and recovery, especially in working and performance horses. This veterinarian-approved formula is 100% natural, non-GMO, and free from fillers, soy, sugar, starches, and artificial flavors, making it safe for horses of all ages, including pregnant mares.
Owners of barrel horses and senior geldings have lauded its transformative effects, noting significant improvements in energy, focus, and overall well-being. One owner shared how their 19-year-old gelding, struggling with arthritis, regained mobility and comfort, easily lifting legs for hoof care after just weeks of use. Beyond joint support, users frequently observe an extra softness and shine to their horses’ coats, increased hoof moisture, and reduced chipping. The small daily scoop size (about half a teaspoon) means a single container lasts for 100 days, making it surprisingly cost-effective despite the initial price.
Designed to enhance mental focus, responsiveness, and support the digestive and immune systems, Equinety Horse XL is an all-encompassing supplement. It’s particularly beneficial for horses needing to build topline and muscle, with many seeing dramatic improvements within 30 days. For those seeking a pure, effective amino acid supplement to boost recovery, muscle development, and overall vitality without unnecessary additives, Horse XL is a truly impactful choice.
Why we love it
- Pure amino acids for cellular repair
- Supports muscle, joint, immune, and digestive health
- No fillers, soy, sugar, or artificial flavors
- Long-lasting 100-day supply
Good to know
- Higher initial cost
- Powder form needs to stick to moistened grain
6. DAC Oil Gallon Jug
The DAC Oil Gallon Jug offers a versatile liquid supplement known for its wide range of benefits for equine health. Enriched with vitamin E and beneficial fatty acids, this oil works wonders for skin, coat, joints, and even contributes to healthy weight management. It’s a popular choice among horse owners looking for a single product to address multiple aspects of their horse’s well-being, from improving a dull coat to supporting stiff joints and digestive regularity.
Tennessee Walking Horse owners and dedicated caregivers consistently report that their horses “just shine” with this product, noting incredibly soft and glossy coats. Many have found it effective in alleviating issues like itchy skin and stiff joints, while also helping older horses with constipation. For hard-keeping horses, it helps to put on and maintain weight, though users with thicker horses advise careful dosing to avoid excessive weight gain. The fish flavor is generally well-accepted, with many horses eating it without hesitation.
This supplement is easy to incorporate into daily feeding, mixing well with grain. While it’s recommended to invest in a good quality pump to avoid mess and product waste, the overall benefits make it a worthwhile addition to any feeding program. If you’re looking for a reliable, multi-purpose oil that delivers noticeable improvements in coat, joint comfort, and digestive health, DAC Oil is a fantastic choice that many horse owners swear by for maintaining their equine companions’ vitality and appearance.
Why we love it
- Enhances coat shine and skin health
- Supports joint flexibility and comfort
- Aids in healthy weight gain or maintenance
- Helps with digestive regularity
Good to know
- Pump not included, recommended for easier use
- Some users found it more effective for coat than weight
7. Manna Pro Weight Accelerator
Manna Pro Weight Accelerator is a specially formulated supplement tailored to meet the unique nutritional needs of senior horses. With high fat and calorie content, it effectively helps older horses gain and maintain a healthy body condition, supporting their energy needs and overall vitality. Beyond weight gain, this supplement is enriched with flaxseed-derived Omega-3s for skin hydration and a glossy coat, probiotics for digestion, and biotin for hoof strength, all while maintaining controlled starch levels for metabolic health.
Owners of aging mares and geldings, some as old as 32, have witnessed remarkable transformations, with horses putting on significant weight (e.g., 75 pounds in two months) and experiencing improved coat condition and increased energy. The soft, easy-to-chew pellets are highly palatable, a crucial factor for senior horses who can be picky or have dental issues. Many have noted that this product succeeded where other senior feeds and supplements failed, becoming an indispensable part of their feeding routine. The inclusion of essential vitamins and antioxidants further supports immune function and protects against oxidative stress.
While some users note that results may not be overnight and consistency over several bags is key, the long-term benefits for older horses are undeniable. It comes with a scoop for easy dosing and mixes effortlessly with feed. If you are caring for a senior horse struggling with weight, coat, or overall vitality, Manna Pro Weight Accelerator provides a comprehensive, palatable, and effective solution designed specifically for their golden years.
Why we love it
- Formulated specifically for senior horses
- High fat and calories for weight gain
- Omega-3s, probiotics, biotin, antioxidants
- Highly palatable, soft, easy-to-chew pellets
Good to know
- Results may take more than one bag
- Not an overnight fix for severe weight loss
8. Manna Pro Cool Calories 100
Manna Pro Cool Calories 100 is a highly concentrated dry fat supplement, boasting an impressive 99% fat content, making it an excellent source of calories for horses. It provides more than twice the energy of carbohydrates, offering “cool, focused energy” ideal for performance horses or those needing weight gain without added excitability. This formula is specifically designed to support healthy weight gain and body condition for underweight horses and hard-keepers, reducing the need to feed larger quantities of grain.
Caretakers of older horses, some as venerable as 36 and 38 years old, consistently rely on this product to keep their equine companions looking “thrifty” and maintaining a healthy weight. Many have observed significant improvements in body condition, with horses developing shiny, smooth coats and silky manes and tails. The supplement’s palatable nature ensures easy acceptance, even by picky eaters, and it mixes well into daily feed. One owner noted its success in helping a 5-year-old TB cross mare gain weight and build muscle without making her “hot,” while also improving hoof health and coat quality.
Regular users affirm that Cool Calories 100 “does the job” effectively, helping horses regain and maintain weight after injury or simply supporting an older horse’s needs. While one user noted a flighty gelding seemed extra touchy on it, this appears to be an isolated incident. For horse owners seeking a high-fat, calorie-dense supplement that provides calm energy and promotes desirable skin and coat condition, Manna Pro Cool Calories 100 offers a reliable and palatable solution.
Why we love it
- 99% fat for concentrated calories
- Provides “cool, focused energy”
- Supports healthy weight gain and body condition
- Enhances skin and coat condition
Good to know
- May make some sensitive horses “touchy”
- Dry form can be dusty if not mixed well
9. Kentucky Equine Research EO-3
Kentucky Equine Research EO-3 is a specialized liquid supplement providing marine-derived long-chain Omega-3 fatty acids, DHA and EPA, from fish oil. These particular fatty acids are more efficiently utilized by horses than plant-based sources, offering significant positive effects on glucose tolerance, red blood cell flexibility, and various inflammatory conditions. It’s also recognized for its reproductive benefits for breeding stallions and pregnant or lactating broodmares, making it a targeted solution for specific health needs.
Horse owners, particularly those with senior horses or those suffering from heaves (equine asthma), have seen remarkable improvements. One dedicated owner successfully weaned their horse off daily Dex medication, observing the horse trotting more and becoming more vocal after consistent use. While some horses may initially be hesitant due to the fishy-bubblegum taste, many users have found success by gradually introducing it or mixing it with molasses. Beyond targeted health benefits, users consistently report incredibly soft and shiny coats, with horses gleaming after just a few weeks of use.
Despite some initial challenges with palatability for very picky eaters and occasional reports of broken seals upon delivery, the long-term benefits of EO-3 are highly praised. It’s considered a staple for many, with some continuing to use it for years, even for older horses with teeth issues or metabolic conditions. If you’re looking for a potent, marine-derived Omega-3 supplement to address inflammatory conditions, support reproductive health, or simply achieve an unparalleled coat shine, Kentucky Equine Research EO-3 offers powerful, targeted nutritional support.
Why we love it
- Marine-derived DHA and EPA for superior absorption
- Targets inflammatory conditions and allergies
- Supports reproductive health
- Dramatic improvements in coat shine and softness
Good to know
- Initial palatability issues for some horses
- Occasional reports of broken seals
- Higher price point
Safety & Care Tips
Proper Dosing & Storage
Always follow the manufacturer’s recommended dosage based on your horse’s weight and condition. Overdosing can lead to digestive upset or other health issues. Store fat supplements in a cool, dry place away from direct sunlight to prevent spoilage and maintain potency. Liquid oils should be sealed tightly to prevent oxidation, and powders or granules should be kept in airtight containers.
Gradual Introduction & Monitoring
When introducing any new supplement, start with a small amount and gradually increase to the full dose over several days to a week. This allows your horse’s digestive system to adapt and helps you monitor for any adverse reactions. Pay close attention to changes in manure, appetite, energy levels, and overall demeanor. If you notice any concerns, consult with your veterinarian immediately.
FAQ
Why does my horse need a fat supplement?
Are fat supplements safe for all horses?
How long does it take to see results from a fat supplement?
Can fat supplements make my horse “hot” or excitable?
Final Thoughts: The Verdict
For most pet parents, the best fat supplement for horses winner is the Equinety Ultimate OEC because it offers comprehensive, vet-approved support for overall wellness without fillers. If you want a powerful 3-in-1 solution for hard keepers, grab the Horse Guard Super Weight Gain. And for supporting senior horses with a palatable, tailored formula, nothing beats the Manna Pro Weight Accelerator.









