Maintaining optimal weight in horses is crucial for their overall health, performance, and well-being. Weight building supplements can be a valuable tool for underweight horses or those recovering from illness. Choosing the right supplement ensures your horse receives the necessary nutrients for healthy weight gain without compromising their digestive health.
Looking for the best Horse Weight Building Supplements?
Discover now our comparison of the best Horse Weight Building Supplements. It is never easy to choose from the wide range of offers. On the market, you will find an incalculable number of models, all at different prices. And as you will discover, the best Horse Weight Building Supplements are not always the ones at the highest prices! Many criteria are used, and they make the richness and relevance of this comparison.
To help you make the best choice among the hundreds of products available, we have decided to offer you a comparison of the Horse Weight Building Supplements in order to find the best quality/price ratio. In this ranking, you will find products listed according to their price, but also their characteristics and the opinions of other customers. Also discover our comparisons by categories. You won’t have to choose your products at random anymore.
No. 1
Manna Pro Weight Accelerator for Senior Horses – Weight Gain and Muscle Support Supplement with Omega...
- HIGH FAT AND CALORIE LEVELS: Manna Pro Senior Weight Accelerator is specially formulated with high fat and calorie content to help senior horses gain and maintain a healthy body condition, supporting energy needs and overall vitality in older horses.
- OMEGA-3 FATTY ACIDS FOR SKIN & COAT: Senior Horse Supplement contains flaxseed-derived Omega-3s to support skin hydration, reduce dryness, and promote a glossy coat. Helps aging horses maintain healthy skin, improved coat condition, and vitality.
- FORMULATED FOR SENIOR HORSES: Tailored nutrition for aging horses with probiotics for digestion, biotin for hoof strength, & controlled starch levels to support metabolic health—delivering balanced energy, immunity, & joint mobility in one great...
- ESSENTIAL VITAMINS & ANTIOXIDANTS: Packed with vital vitamins, antioxidants that support a healthy immune system & help protect senior horses from oxidative stress, promoting overall wellness, vitality & resilience to keep them feeling their best.
- HIGHLY PALATABLE & EASY TO FEED: Specially designed for senior horses, this soft, easy-to-chew pellet ensures consistent intake. Fortified with amino acids and antioxidants to support aging joints, muscle maintenance, and overall vitality in older horses.
$36.99
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No. 2
Manna Pro Cool Calories 100 – High-Calorie Dry Fat Supplement for Horses – Supports Healthy Weight Gain...
- HIGH IN FAT: Contains 99% fat, which is an excellent source of calories and contains more than two times the energy of carbohydrates
- COOL ENERGY: High calorie density of Cool Calories 100 provides cool, focused energy for performance horses
- WEIGHT AND BODY CONDITION: Concentrated source of calories supports healthy weight gain and body condition for underweight horses and hard-keepers and reduces the need to feed more grain
- FATTY ACIDS: Contains fatty acids to support desirable skin and glossy coat condition
- HIGHLY PALATABLE: Easy to feed and highly palatable
$31.49
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No. 3
100-Day Supply Horse XL Supplement – Amino Acids for Cellular Repair, Coat Defense, Weight Gain, Joint...
- HIGH-PERFORMANCE EQUINE NUTRITION - Horse XL can help boost horse injury repair, especially in working and performance horses. Horses of all ages and sizes, including pregnant mares, can use our joint supplement for horses. It's a must-have for supporting...
- VETERINARIAN-APPROVED SUPPLEMENT – Horse XL contains a proprietary blend of branched essential amino acids which are the building blocks of protein. Our horse coat defense is necessary for strength and muscle repair.
- PURE AMINO ACIDS SUPPLEMENT - Equinety Horse XL hoof supplements for horses are made in the USA, 100% natural, and non-GMO. It does not contain fillers, soy, sugar, starches, or artificial flavors - a formula safe for horses.
- HELPS ENHANCE HORSE'S LIFE - Our horse feed can help improve mental focus and responsiveness. It's also a digestive, immune system, and horse joint supplement. Make it a part of your equine supplies and see your horse improve over time.
- 100-DAY SUPPLY – One tub of Horse XL lasts 100 days - 1 scoop daily is all you need for regular horses - but for injured horses, you may need to give 2 scoops, depending on the vet's advice. Horse XL is a pituitary supplement so there is no need to...
No. 4
Farnam Weight Builder Weight Support Supplement for Horses, Helps Maintain Optimal Body Condition, 7.5 lb...
- HELPS MAINTAIN OPTIMAL WEIGHT AND BODY CONDITION with a nutritionally balanced high-fat formula.
- CONTAINS 50% FAT to provide more calories than equal weights of grain, so less volume needs to be fed.
- PROVIDES EASILY DIGESTIBLE CALORIES WITH NO SUGAR ADDED to safely add calories without the risk of digestive upset.
- HELPS MAINTAIN HEALTHY SKIN AND A GLOSSY COAT with omega-3 fatty acids from flaxseed meal and heat stabilized rice bran.
- DELIVERS A CALMING ENERGY to help horses reach and maintain rigorous performance demands.
- PALATABLE, EASY-TO-FEED powder mixes in easily with horse’s regular grain ration.
- Provides a 30-day supply at 4 oz. serving per day for one horse
- Weight Builder 7.5 lb. is part of the Horse Care Loyalty Rewards Program -- enroll today!
$49.97
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No. 5
Horse Guard Super Weight Gain 10 lb – 3-in-1 Horse Weight Gain Supplement with Full-Fat Soy, Probiotics...
- 3-IN-1 FORMULA FOR TOTAL SUPPORT: Combines full-fat extruded soybeans, probiotics, and Horse Guard’s vitamin-mineral package into one powerful horse weight gain supplement for healthy weight, coat, and digestion.
- VISIBLE RESULTS FOR HARD KEEPERS: Ideal for senior, rescue, or underweight horses; promotes safe, healthy weight gain while improving energy and topline. The go-to weight builder for horses needing extra care.
- BETTER COAT, BETTER CONFIDENCE: Extruded soy improves coat shine and skin health. Helps your horse look and feel better from the inside out with a high-quality horse feed supplement that makes results visible.
- DIGESTIVE SUPPORT & IMMUNE DEFENSE: Prebiotics and probiotics boost gut health and nutrient absorption, while 1,500 IU of Vitamin E per dose supports a strong immune system – ideal for stressed, recovering, or sensitive horses.
- EASY DOSING, 20 SERVINGS PER BAG: Each 10 lb bag contains approx. 20 servings for a 1,000 lb horse. Scoop included. Trusted since 1978, Horse Guard delivers premium equine supplements with science-backed nutrition.
SaleNo. 6
Formula 707 Weight Gain Equine Supplement, Daily Fresh Packs, 28 Day Supply - Palatable, Calorie-Rich...
- Establish and maintain a healthy weight while improving muscle tone and energy with a highly palatable, calorie-rich supplement formulated to help all types of horses maintain a healthy metabolism
- Vegetable fat provides easily digestible calories and increases your horse's overall energy, and high-quality protein provides essential amino acids necessary for the body to build muscle
- Daily Fresh Packs are sealed to keep out oxygen, moisture and sunlight, and are convenient for traveling, events and daily use in your feeding regimen
- Accurate, pre-measured packs are convenient and easy to use
No. 7
Formula 707 Weight Gain Crumble Equine Supplement, 7 lb Bag – Palatable, Calorie-Rich Nutritional Support...
- WEIGHT SUPPORT: Establish and maintain a healthy weight while improving muscle tone and energy.
- PALATABLE CRUMBLES: Highly palatable, calorie-rich supplement formulated to help all types of horses maintain a healthy metabolism. Please note these are NOT pellets.
- COMPREHENSIVE SUPPORT: Vegetable fat provides easily digestible calories and increases your horse’s overall energy, and high-quality protein provides essential amino acids necessary for the body to build muscle.
- MADE WITH FIBER: Fiber helps keep the digestive system working smoothly.
- Formulated and manufactured by John Ewing Company in Colorado, USA, where we've been Helping Horses Succeed Since 1948.
No. 8
Formula 707 MuscleMx Equine Supplement, 3lb Bag – Conditioning Support and Muscle Builder for Horses with...
- Empower your horse's metabolism to build optimum definition and muscle mass.
- Combines four natural ingredients that synergistically encourage muscle-building metabolic reactions.
- Lysine, an amino acid, aids in developing muscle-building proteins; Gamma oryzanol encourages weight gain and muscle formation.
- Creatine helps supply energy to muscle cells by stepping up production of ATP; Ornithine-A-Ketoglutarate (OKG) helps the body bypass metabolic processes that prevent new muscle development.
- Formulated and manufactured by John Ewing Company in Colorado, USA, where we've been Helping Horses Succeed Since 1946
No. 9
Pennwoods Body Builder 4000 Horse Weight Gain Supplement, High Fat & Energy Weight Builder with Body...
- HORSE PRODUCTS BY HORSE PEOPLE: Family-owned and operated, manufactured in small batches at our Centre Hall, Pennsylvania facility using locally sourced ingredients. Developed with real horse-owner experience to ensure quality, consistency, and...
- IDEAL FOR HARD KEEPERS, CALORIE-DENSE HIGH FAT FORMULA: Pennwoods Body Builder 4000 is specially formulated for horses that are thin, hard to keep, or have high energy demands. Its calorie-dense, high-fat formula helps horses safely gain and maintain...
- PROMOTES BODY CONDITION AND TOPLINE: This supplement provides a concentrated energy source from fat and quality protein rather than sugar or starch, making it ideal for performance, breeding, or lactating horses. It helps maintain body condition, energy...
- SUPPORTS OVERALL PHYSICAL CONDITION: High-quality fat and protein in this formula can help support hoof quality, muscle tone, and a healthy coat when used as part of a balanced diet. By providing calories from fat instead of high-starch grains, it offers...
- SAFE, DAILY SUPPLEMENT WITH VERSATILE FEEDING OPTIONS: Easy to incorporate into daily rations, Body Builder 4000 can be added to feed for mature, breeding, or performance horses. Its concentrated energy formula allows you to adjust feeding based on...
SaleNo. 10
Farnam Weight Builder Support Supplement for Horses, Helps Maintain Optimal Weight and Body Condition...
- HELPS MAINTAIN OPTIMAL WEIGHT AND BODY CONDITION with a nutritionally balanced high-fat formula.
- CONTAINS 50% FAT to provide more calories than equal weights of grain, so less volume needs to be fed.
- PROVIDES EASILY DIGESTIBLE CALORIES WITH NO SUGAR ADDED to safely add calories without the risk of digestive upset.
- HELPS MAINTAIN HEALTHY SKIN AND A GLOSSY COAT with omega-3 fatty acids from flaxseed meal and heat stabilized rice bran.
- DELIVERS A CALMING ENERGY to help horses reach and maintain rigorous performance demands.
- PALATABLE, EASY-TO-FEED powder mixes in easily with horse’s regular grain ration.
- Provides a 90-day supply at 4 oz. serving per day for one horse
−8%
$116.49
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Last update on 2026-04-28 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Horse Weight Building Supplements
Understanding Your Horse's Needs
Before purchasing any supplement, assess why your horse is underweight. Is it due to poor appetite, digestive issues, increased metabolic rate, or insufficient calories in their diet? Consulting with a veterinarian is essential to rule out underlying medical conditions and determine the best course of action. They can help identify specific nutritional deficiencies that a supplement should address.Key Ingredients to Look For
Look for supplements rich in essential fatty acids, often derived from sources like flaxseed or oils, which provide calorie-dense energy. Protein is vital for building muscle mass, so ingredients like amino acids (lysine, methionine) are beneficial. Prebiotics and probiotics can support gut health, ensuring efficient nutrient absorption, which is fundamental for weight gain. Yeast cultures can also aid digestion and nutrient utilization.Forms and Administration
Supplements come in various forms, including powders, pellets, and liquids. Powders are often mixed into feed, which is convenient for most horses. Pellets can also be mixed in or fed separately. Liquids might be easier for horses with picky appetites or those who are difficult to get to eat supplements mixed in their feed. Consider which form will be most readily accepted by your horse.Evaluating Supplement Quality and Safety
Choose products from reputable brands that clearly list all ingredients and their quantities. Look for third-party testing certifications, such as those from NSF International or USP, which verify product purity and potency. Ensure the supplement is specifically formulated for horses and avoid products with unnecessary fillers or artificial ingredients. Check the expiration date to ensure freshness and efficacy.Comparison Tips
When comparing products, prioritize those with scientifically backed ingredients known for promoting healthy weight gain. Consider the palatability, as a supplement is only effective if your horse will consume it consistently. Read reviews from other horse owners to gauge real-world effectiveness and ease of use. Always compare the nutritional profile and ingredient list against your horse's specific dietary requirements as advised by your veterinarian.Frequently Asked Questions
How quickly can I expect to see results from a weight building supplement?
Results can vary depending on the individual horse, the severity of underweight, and the supplement's formulation. Typically, noticeable changes may take several weeks to a few months of consistent use. It's important to monitor your horse's condition and consult your vet if you have concerns.
Can I give my horse a weight building supplement if they are already on a balanced diet?
Yes, but it's best to do so under veterinary guidance. A supplement can help boost calorie intake or provide specific nutrients lacking in the current diet. Your vet can help determine if it's necessary and won't interfere with their existing feeding program.
Are there any side effects associated with weight building supplements?
When used as directed and under veterinary supervision, side effects are rare. However, introducing any new supplement too quickly can sometimes lead to digestive upset. Always follow the recommended dosage and transition gradually.
What is the difference between a weight builder and a vitamin/mineral supplement?
Weight builders are specifically designed to increase calorie intake and promote muscle mass development, often containing fats, proteins, and energy-dense ingredients. General vitamin/mineral supplements focus on ensuring adequate micronutrient levels for overall health, which may not directly lead to significant weight gain.
How should I store these supplements?
Most horse supplements should be stored in a cool, dry place away from direct sunlight. Always refer to the product packaging for specific storage instructions. Proper storage helps maintain the supplement's potency and shelf life.
Can I combine different weight building supplements?
It is generally not recommended to combine multiple weight building supplements without consulting your veterinarian. Doing so could lead to an oversupply of certain nutrients or an imbalance in your horse's diet, potentially causing adverse effects.
