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10 Best Weight Gain Supplements For Horses 2025 in the United States

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Our Top Picks

#1

Winner

100-Day Supply Horse XL Horse Supplements – Horse Care W/ 8 Essential Amino Acids to Promote Cellular Repair - No Soy or Sugar Coat Defense for Horses - Horse Joint Supplement & Horse Hoof Supplements

Rating
9.8
Chosen by1,432
Protein Levels
Digestibility
Vitamin and Mineral Content

Most important from
1998 reviews

Protein Levels
A small daily dose delivers excellent value, lasting over three months for a large horse while supporting effective recovery and muscle repair.
Digestibility
Consistent use aids significantly in healing from hoof injuries and infections, restoring soundness and improving gait.
Vitamin and Mineral Content
It promotes healthier, more resilient hooves with increased moisture and reduced chipping, even in extremely dry climates.

The Horse XL supplement by Equinety is designed primarily to support injury repair, joint health, and hoof strength in horses of all ages and breeds. Its key benefit is its high-quality blend of essential amino acids, which are important building blocks for muscle and tissue repair. The supplement is free from fillers, soy, sugar, and artificial additives, making it a clean, natural option that is safe for regular use. One tub provides a 100-day supply with a simple dosing routine.

This product focuses on providing protein through amino acids rather than delivering calories or fats to increase a horse’s weight. It comes in an unflavored powder form that is easy to mix with feed, supporting palatability. While it does not contain added vitamins or minerals targeted at weight gain, its natural and pure ingredients contribute to good digestibility, which supports overall health and nutrient absorption.

Horse XL also claims to aid mental focus and immune health, extending its benefits beyond joint and hoof care. It is a solid choice for enhancing recovery, muscle repair, and joint function with a clean, vet-approved amino acid formulation. For those seeking a supplement specifically aimed at weight gain with higher calories, fats, and comprehensive vitamins and minerals, other products may be more suitable.

Rating
9.8
Chosen by1,432
Protein Levels
Digestibility
Vitamin and Mineral Content

Most important from
1998 reviews

Protein Levels
A small daily dose delivers excellent value, lasting over three months for a large horse while supporting effective recovery and muscle repair.
Digestibility
Consistent use aids significantly in healing from hoof injuries and infections, restoring soundness and improving gait.
Vitamin and Mineral Content
It promotes healthier, more resilient hooves with increased moisture and reduced chipping, even in extremely dry climates.
#2

Manna Pro Weight Accelerator For Senior Horses, Made with Omega 3 Fatty Acids, Formulated with Flaxseed, Weight Gain Supplement for Horses, 8 lbs

Rating
9.6
Digestibility
Vitamin and Mineral Content
Palatability

Most important from
1689 reviews

Digestibility
Horses initially unsure about the powder but soon took to it and now leave no trace in their buckets.
Vitamin and Mineral Content
A dream for older horses with ingredients like antioxidants, Omega-3, protein, fats, biotin, and probiotics.
Palatability
Works wonderfully for picky horses and is definitely worth the money.

The Manna Pro Weight Accelerator for Senior Horses is specifically designed to help older horses gain weight and improve their body condition. This supplement boasts high levels of fat and calories, which are essential for weight gain. Notably, it includes Omega 3 Fatty Acids from flaxseed, which support healthy skin and coat, making it a multipurpose product. Additionally, the formulation contains probiotics for better digestion and biotin for hoof growth, addressing common health concerns in senior horses.

Essential vitamins and antioxidants included in the mix help in boosting the immune system, which is crucial for older horses. One of its main strengths is its palatability, ensuring that horses are likely to consume it without fuss. The inclusion of active ingredients like ascorbic acid and vitamin E further enhances its nutritive value. However, while it's noted to be highly palatable and easy to feed, it’s essential for users to monitor the horse's response to the supplement.

The product is suitable for all breed sizes and life stages, although its main target is senior horses. Potential users should consider the substantial packaging weight, as the 8-pound size could be cumbersome for some. This supplement shows indications of positive outcomes, but always consult with a veterinarian before beginning any new dietary regimen for your horse to ensure it suits their specific health needs.

Rating
9.6
Digestibility
Vitamin and Mineral Content
Palatability

Most important from
1689 reviews

Digestibility
Horses initially unsure about the powder but soon took to it and now leave no trace in their buckets.
Vitamin and Mineral Content
A dream for older horses with ingredients like antioxidants, Omega-3, protein, fats, biotin, and probiotics.
Palatability
Works wonderfully for picky horses and is definitely worth the money.

Buying Guide for the Best Weight Gain Supplements For Horses

When choosing weight gain supplements for horses, it's important to consider the specific needs of your horse, such as their age, activity level, and any health issues they may have. The right supplement can help your horse gain weight in a healthy and sustainable way. Here are some key specifications to consider when selecting a weight gain supplement for your horse.
Caloric ContentCaloric content refers to the amount of energy provided by the supplement. This is important because horses need a certain amount of calories to maintain or gain weight. Supplements with higher caloric content are more effective for weight gain. If your horse is underweight, look for supplements with a high caloric content. For horses that need to gain a moderate amount of weight, a supplement with a moderate caloric content may be sufficient.
Protein LevelsProtein is essential for muscle development and overall health. High-protein supplements can help build muscle mass, which can contribute to weight gain. For young or highly active horses, a supplement with higher protein levels is beneficial. For older or less active horses, a moderate protein level may be more appropriate to avoid unnecessary strain on their kidneys.
Fat ContentFat is a dense source of calories and can help horses gain weight without requiring them to eat large amounts of feed. Supplements with higher fat content are particularly useful for horses that have difficulty consuming large volumes of food. If your horse is a picky eater or has a high metabolism, a high-fat supplement can be very effective. For horses that are already consuming a balanced diet, a supplement with moderate fat content may be sufficient.
DigestibilityDigestibility refers to how easily the horse can break down and absorb the nutrients in the supplement. Highly digestible supplements ensure that your horse gets the maximum benefit from the nutrients provided. If your horse has digestive issues or is older, look for supplements that are specifically formulated to be highly digestible. For healthy, younger horses, standard digestibility may be adequate.
Vitamin and Mineral ContentVitamins and minerals are crucial for overall health and can support weight gain by ensuring that the horse's body functions optimally. Supplements that are rich in essential vitamins and minerals can help address any deficiencies that might be hindering weight gain. If your horse's diet is lacking in specific nutrients, choose a supplement that fills those gaps. For horses on a well-balanced diet, a supplement with a standard vitamin and mineral profile may be sufficient.
PalatabilityPalatability refers to how appealing the supplement is to the horse. Even the most nutritious supplement is useless if the horse refuses to eat it. Supplements that are more palatable are more likely to be consumed consistently. If your horse is a picky eater, look for supplements that are known for their good taste. For horses that are not fussy, palatability may be less of a concern.

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