This article highlights top fat-based supplements designed to support weight gain, muscle development, and overall vitality in horses. Each product below targets high-calorie intake, energy support, and coat or hoof health, helping hard-keepers, senior horses, and performance animals maintain optimal body condition. A concise buying guide follows to help you compare options and choose the right supplement for your horse’s needs.
| Product | Brand | Type | Key Benefit |
|---|---|---|---|
| Manna Pro Weight Accelerator for Senior Horses | Manna Pro | High-fat, high-calorie supplement | Energy, vitality, coat health |
| Manna Pro Cool Calories 100 | Manna Pro | High-fat dry fat supplement | Healthy weight gain, body condition |
| Farnam Weight Builder | Farnam | High-fat formula | Optimal weight maintenance, easy digestion |
| Pennwoods Body Builder 4000 | Pennwoods | High-fat, high-energy weight gainer | Muscle conditioning, hoof quality |
| Manna Pro Simply Flax | Manna Pro | 100% ground flaxseed | Omega-3 richness, coat and immune support |
Manna Pro Weight Accelerator for Senior Horses

The Manna Pro Weight Accelerator for Senior Horses provides a high-fat, high-calorie formulation designed to help aging horses gain and maintain body condition. It supports energy needs and overall vitality in older horses, with flaxseed-derived Omega-3 fatty acids for skin and coat health. The formula also includes probiotics for digestion, biotin for hoof strength, and controlled starch levels to support metabolic health, delivering balanced energy, immunity, and joint mobility in one product.
Manna Pro Cool Calories 100

Cool Calories 100 is a high-calorie, high-fat dry supplement designed to support healthy weight gain and body condition for horses needing extra energy. The product provides a dense calorie source that promotes weight gain and improves performance potential. It helps reduce the need for added grain by delivering concentrated energy suitable for hard-keepers and those with elevated caloric needs.
Farnam Weight Builder

Farnam Weight Builder is a nutritionally balanced, high-fat formula designed to help maintain optimal weight and body condition. This product contains about 50% fat to deliver more calories per equal weight than grains, allowing a smaller feeding volume while providing easily digestible calories with no added sugar to minimize digestive upset. It aims to support energy levels and muscular condition without overstressing the horse’s system.
Pennwoods Body Builder 4000

Pennwood’s Body Builder 4000 is a high-fat, high-energy supplement designed to promote weight gain and muscle conditioning in horses. This formula also emphasizes hoof quality improvements and supports lactating mares in maintaining proper weight through peak performance periods. The product provides dense calories and essential nutrients to sustain athletic horses and those recovering from illness or fatigue.
Manna Pro Simply Flax for Horses

Simply Flax is a 100% pure ground flaxseed supplement offering a natural source of omega fatty acids. It supports healthy skin and coat, joint function, and immune health. By providing essential fatty acids for resilience and vitality, this flax-based supplement helps horses look and feel their best all year long.
Buying Guide
Key purchase considerations when selecting a fat-based supplement for horses include caloric density, fat source quality, digestive tolerance, and targeted benefits. High-fat formulas deliver concentrated calories with less bulk, which is beneficial for hard-keepers, senior horses, and athletic performers. Look for products with proportionally balanced protein and controlled starch levels to support energy without digestive upset. Omega-3 content from flaxseed or similar sources can improve coat, skin health, and anti-inflammatory support. Probiotics and biotin may aid digestion and hoof health, especially for aging horses. Consider your horse’s life stage, activity level, and any dietary restrictions when choosing a supplement. Compare calorie delivery per serving, palatability, and feeding guidelines to determine the best fit. For performance horses, align supplement choice with training demands and seasonal conditioning goals. Always follow manufacturer feeding instructions and consult a veterinarian if your horse has a medical condition or unusual appetite changes.