6 Best Weight Gain Supplements for Horses

An underweight horse depicts that the horse draws little nutrients from its feeds. Weight gain supplements for horses help to maintain the weight of your horse. In return, your horse gets the energy reserves it needs for various activities.

Among the supplements that we have highlighted, DAC Bloom 5lb stands out from the rest. It can improve the quality of the horses’ hooves, which is an element that the rest of the supplements miss.  

We advise you to look out for the best weight gain supplement for horses at all times. But, what are some of the best brands to buy?

The Best Horse Weight Boosters at a Glance

  1. DAC Bloom 5lb (Best for Increasing weight and improving the quality of the skin, coat, and hooves of all horse breeds) (Rated 4.9 stars)
  2. Farnam Weight Builder (Best for increasing weight of any horse breed or life stage) (Rated 4.7 stars)
  3. Manna Pro Weight Accelerator for Senior Horses (Best for maintaining the weight of senior horses) (Rated 4.7 stars)
  4. Manna Pro Cool (Best for boosting weight of all horse breeds) (Rated 4.7 stars)
  5. Formula 707 Daily Fresh Packs Equine Supplements (Best for maintaining a healthy weight and improving energy and muscle tone of all horse breeds) (Rated 4.6 stars)
  6. Horse Guard Super Weight Gain (Best for increasing weight and improving the digestive system of emaciated horses) (Rated 4.6 stars)

Best Weight Gain Supplements for Horses Reviewed

DAC Bloom 5lb (Best Overall)


  • Fit for all horses
  • Improves skin and coat health
  • Helps in weight gain
  • Form: granular
  • It has essential amino acids
  • It has enhanced proteins
  • Weight: 5lb and 40lb
  • Guaranteed Analysis: Crude Fat (Min): 9,930 mg, Zinc (Min): 215 mg, Biotin (Min): 1.25 mg, and Methionine (Min): 210 mg. 
  • Ingredients: calories 100 (vegetable fat supplement), bio-available trace minerals, zinc, Methionine, Lysine, Biotin, and ground flaxseed. 
  • Directions of use: Maintenance: 1 scoop per horse daily, Preparation for the show: 2 scoops per horse daily, Performance: 3 scoops per horse daily.

DAC Bloom falls under the NASC-certified horse supplements. Therefore, if you find your horse losing weight but eating, you should introduce DAC Bloom to its feeding program. Regardless of the life stage or breed of your horse, this supplement will increase its weight.


  • The fatty acids improve the condition of the horse’s hair and skin
  • The calories help in weight gain and generation of energy during exercises 
  • The trace minerals help to improve the absorption rate
  • Zinc helps to improve the condition of the hooves


  • You cannot return any purchases

From the Amazon reviews, Bloom has a high effective rate. So, we can recommend it to any farmer with a skinny horse. However, you should consult your veterinarian before using the supplement together with fortified feeds, medicine, and other supplements. Also, the supplement fits health maintenance purposes only.

Farnam Weight Builder (Best for Increasing Weight of any Horse Breed) 

Amazon’s Choice in “Horse Skin, Coat & Hoof Supplements by Farnam”


  • Fit for your senior, underweight, mature, or performing horse (any breed or life stage)
  • Calorie: concentrated fat
  • No added sugar
  • Maintaining coat and skin condition, and phosphorus to calcium ratio, and provides performance fuel
  • Form: Granular
  • Weight: 7.5lb
  • Guaranteed analysis: Crude protein (min): 14.0%, Crude fat (min): 40.0%, Omega 3 Fatty Acids (min): 3.0%, Crude fiber (max): 7.0%, Calcium (min): 0.8%, Calcium (max): 1.2%, and Phosphorus(min): 0.5%
  • Ingredients: Dehydrated maize (soluble distiller’s grains), Flax meal (heat stabilized), calcium carbonate, vegetable fat (partially hydrogenated), preservatives (propionic acid, mixed tocopherols, BHT, and BHA), and artificial flavor.
  • Directions: To improve coat and skin condition: 2 scoops daily (60 days), and to increase its weight: 4 scoops (30 days)

This NASC-approved horse supplement increases the calorie intake of your horse without causing any digestive upset. The grains that make Farnam Weight Builder are soluble to ease digestion. So, it is an easy-to-digest horse weight gain supplement.


  • 50% fat helps your horse maintain optimal weight and improve the body condition of your horse
  • No added sugar for horses with dietary needs
  • Increases the energy density of your horse feeding program
  • Omega-3 fatty acids for a calm demeanor and improved immunity.
  • Balanced phosphorus to calcium ratio to prevent skeletal, heart, and nerve disorders for growing horses.


  • No known adverse effects

The effectiveness of Farnam is research-backed. According to research, adding fats to a horse’s diet helps it maintain body weight, eat less, and digest its feeds easily. Hence, we approve of its use as the best horse weight gain supplement. 

Farnam comes with an unconditional guarantee. Failure to achieve a change after 30 days attracts a full refund. Importantly, consult your veterinarian before mixing the supplement with medicine and other supplements.

Manna Pro Weight Accelerator for Senior Horses (Best for Maintaining the Weight of Senior Horses


  • Specifically for senior horses
  • Highly palatable
  • Contains Omega-3s
  • Contains probiotics
  • It has essential antioxidants and vitamins
  • Size: 8lb
  • Form: Granular
  • Guaranteed Analysis: Crude Protein (Min): 3.0%, Crude Fat (Min): 80.0%, Crude Fiber (Max): 5.0%, Vitamin E (Min): 250 IU/lb, Ascorbic Acid (Max): 250mg/lb, Biotin (Min): 120 mg/lb, Omega-3 Fatty Acid (Max): 5.0%, Saccharomyces cerevisiae (Min): 4.54 x 109 CFU/lb, and Lactobacillus acidophilus (Min): 9.14 x 106
  • Ingredients: Vegetable fat (mixed with tocopherols), Vitamin E, ground flaxseed, I-ascorbyl-2-polyphosphate, artificial flavor, biotin, active dry yeast, dried fermentation solubles (Aspergillus oryzae, Bacillus licheniformis, Bacillus subtilis, Bacillusamyloliquefaciens, dried Trichoderma longibrachiatum), dried fermentation products (Enterococcus faecium, Lactobacillus acidophilus, Lactobacillus casei, and Lactobacillus Plantarum).
  • Directions for use: top dress or mix 2-10 ounces with grain per horse daily.

Manna Pro Weight Accelerator for senior horses is one of the NASC-approved weight-gaining supplements for horses. If you do not know how to put weight on an old horse, feeding it with the weight accelerator from Manna Pro is one of the solutions. 


  • The Omega-3S improves the health of the coat and skin
  • Increases weight
  • The probiotics support digestion
  • Improves hoof condition
  • The essential antioxidants and vitamins support the immune system
  • Highly palatable for senior horses


  • If introduced rapidly, it can cause loose stool

Manna Pro supplement for senior horses has received positive reviews on Amazon. So, it stands as highly effective, and we recommend it to horse owners. However, before using it with medicine and other supplements, you should consult your veterinarian.

Use the Manna Pro Weight supplement for horse maintenance purposes. For example, feeding your horse with 10 ounces every day makes an 8 lbs unit last for around 15 days. If you see no improvements, you should return it with a receipt to the seller for a full refund.

Manna Pro Cool (Best for Boosting Weight of All Horse Breeds

Amazon’s Choice in “Horse Digestive Aids by Manna Pro”


  • Suitable for all horses
  • Easy-to-use addition to the horse feeding program
  • Adds weight and energy and improves the hair coat condition
  • Contains essential fatty acids
  • Contains 5x the fat of 40 lbs of rice bran
  • No conflict with fortified feeds
  • Form: dry-beaded 
  • Highly palatable
  • Contains no carbohydrates or sugar
  • Guaranteed Analysis: Crude fat (Min): 99%, Total fatty acids (Min): 95%, Free fatty acids (Max): 1%, Unsaponifiable matter (Max): 1.5%, Insoluble impurities (Max): 0.5%, and Moisture (Max): 1%. 
  • Ingredients: Vegetable fat (with mixed tocopherols) and artificial flavor
  • Weight: 8 lbs and 20 lbs
  • Directions of use: top-dress or hand-mix 2-4 oz with grains per horse daily. Large horses under intense training require 3-8 oz daily.

Manna Pro Cool is an NASC-certified weight booster for horses. It is one of the best weight gain supplements for equines, given its several benefits to a horse. If you have underweight horses, you will find Pro Cool as a supplement for super weight gain.


  • Fit for all horse breeds
  • High-fat content and concentrated source of calories to energize your horse
  • The fatty acids make your horse have a glossy coat. 


  • Rapid introduction can cause loose stool

Pro Cool has received numerous positive reviews. So, we can recommend it as one of the top-rated weight-gaining supplements for horses. First, however, inquire about its compatibility with medicine and other supplements from your veterinarian.

Manna Pro Cool promises a 100% satisfaction guarantee. It is a maintenance supplement that helps you use less feed on your horses but increases their weight. Last, it is fit for any horse breed of all life stages.

Formula 707 Daily Fresh Packs Equine Supplements (Best for Maintaining Weight, and Improving Energy and Muscle Tone of All Horse Breeds


  • Fit for all horses
  • Form: crumbles
  • Weight: 7.92lbs
  • Sealed packs for 28 days
  • Calorie-rich vegetable fat
  • Contains proteins
  • Contains fiber
  • Highly palatable
  • Apple flavor
  • Guaranteed Analysis: Crude Protein (min): 14.0%, Crude Fat (min): 35.0%, Crude Fiber (max): 8.0%, Calcium (min): 0.75%, Calcium (max): 1.25%, Phosphorus (min): 0.50%, Zinc (min): 65 PPM, Copper (min): 15 PPM
  • Ingredients: Vegetable fat (dried), processed grain by-products, plant protein, roughage products, calcium carbonate, vitamin E supplement, cane molasses, artificial flavor, and monocalcium phosphate
  • Directions of use: 1 pack daily

Formula 707 is NASC-certified. Also, D, Wayne Lukas, US Racing Hall of Fame Inductee, endorsed the supplement as the best horse feed for weight gain. Regardless of the breed of your horse, Formula 707 is precise on the needs of your horse. 


  • The vegetable fat provides digestible calories to energize your horse
  • The amino acids from proteins help your horse to build muscles
  • The pre-measured packs are easy to use, and they keep the supplement dry


  • No known drawbacks at the moment

Given several successful results from Amazon reviews, we recommend Formula 707 to all horse owners. However, make consultations with a veterinarian before serving Formula 707 with medicine and other supplements. Also, the label does not cite any warranty or guarantee. But, the product befits horse maintenance purposes. 

Horse Guard Super Weight Gain (Best for Increasing Weight and Improving the Digestive System of Emaciated Horses


  • Fit for horses that lose weight because of winter and competition stress. It is also ideal for senior, recovering, or rescued neglected horses.
  • Improves weight and coat condition
  • Maintains a healthy digestive system
  • Improves overall health condition
  • Weight: 10 lbs
  • Form: Powder
  • Guaranteed Analysis: Protein: 35%, Fiber (Max; 35%, Fat: 15%, Lysine (55%): 2500mg, Methionine (55%): 2500mg, Vitamin A: 10,000IU, Vitamin D3: 4000IU, Vitamin E, Vitamin B12: 150mcg, Vitamin B2: 44mg, Vitamin B1: 25m,g Vitamin B6: 30mg, Vitamin C: 252mg, Folic Acid: 3650mcg, Pantothenic acid: 38mg, Choline Chloride: 125mg, Biotin: 9mg, Calcium: 980mg, Phosphorus P: 720mg, Iron: 100mg, Copper: 30mg, Magnesium (0.07mg): 350mg, Manganese (0.04%): 175mg, Zinc (0.08%): 400mg, Iodine (o.001%): 4mg, Selenium (0.0013%): 6mg, Cobalt (0.0013%): 6mg, Methionine (1.25%): 5675mg, Yeast Culture (1.5%): 6810mg, Saccharomyces Cerevisiae (Min): 5 billion
  • Ingredients: Ground Extruded Whole Soybeans, dl Methionine, Selenium Yeast, Vitamins( A Acetate, D3, E, B12, B2, B1, B6, C), Folic Acid, D-Biotin, D-Calcium Pantothenate, Choline Chloride, Monocalcium/Dicalcium Phosphate, Ferrous Sulfate, Iron Proteinate, Manganous Oxide, Manganese Proteinate, Magnesium Proteinate, Copper Proteinate, Zinc (Sulfate and Oroteinate), Ethylenediamine Diahydiodide, Cobalt (Sulfate and Proteinate), Direct-Fed Microorganisms- Enterococcus faecium, Lactobacillus (Acidophilus, casei, and Plantarum), Live Yeast Culture, and Saccharomyces Cerevisiae.
  • Directions of use: 8 ounces per 1,000 lbs equine

Horse Guard Super Weight Gain founder, Del Johnson, was a Certified Equine Nutritionist. The supplement befits any breed of horse that requires weight salvaging. So, if you need to know how to put weight on an old horse, look no further. 


  • The quality protein adds weight to your horse in a healthy way
  • Probiotics and prebiotics improves the gut system
  • Meets most of the trace minerals and vitamins needs
  • Soya beans add energy without heating your horse


  • No known side effects or harm

From various customer ratings, we recommend these super weight gain supplements to any horse keeper. However, we advise you to seek professional help before mixing this product with medicine and other supplements.

Horse Guard Super Weight Gain has a 100% satisfaction guarantee. For a 1000lb horse, a 10lb bag of this supplement can last for 20 days, while a 40 lbs bag can last for 80 days. However, the manufacturer of the supplement is silent on any warranty or guarantee.

Our Final Verdict

As observed, most horse supplements maintain the health of a horse. Also, look out for veterinary or NASC certification that proves the supplements as having a high quality. Notably, the weight of a horse translates into its energy. So, it is time to set out and shop for the best weight-adding supplement for your horse.

Regarding our favorite best weight-adding supplement, we recommend the DAC Bloom 5lb. It has the ability to improve the hooves of your horse besides adding weight and improving the skin and coat condition. Also, you can use it on any horse.