For horses needing extra calories, lean body condition, or enhanced energy without excessive grain, fat-based supplements can help. This guide reviews five top fat-boosting products designed to support weight gain, muscle maintenance, and coat health while prioritizing digestion and metabolic balance. Each option offers high-fat formulas or concentrated calories tailored for performance horses, seniors, and hard keepers alike.
| Product | Brand | Notes |
|---|---|---|
| Manna Pro Weight Accelerator for Senior Horses | Manna Pro | High fat, omega-3s, senior-focused formulation |
| Manna Pro Cool Calories 100 | Manna Pro | Concentrated fat booster, low starch |
| Purina Amplify High-Fat Horse Supplement | Purina | Balanced fat with antioxidants and easy digestion |
| 100-Day Supply Horse XL Supplement | Equinety | Amino-acid rich for recovery and conditioning |
| Farnam Weight Builder Weight Support | Farnam | High-fat formula for weight gain, no sugar |
Manna Pro Weight Accelerator For Senior Horses

High fat and calorie levels support weight gain and muscle maintenance in older horses. The formula emphasizes energy needs and vitality for senior horses, helping sustain body condition with increased caloric density. It also includes flaxseed-derived Omega-3 fatty acids to promote skin hydration and a glossy coat, aiding overall vitality. The senior-focused nutrition combines probiotics for digestion, biotin for hoof strength, and controlled starch to support metabolic health in one comprehensive mix.
Manna Pro Cool Calories 100

Cool Calories 100 provides a concentrated, fat-based energy boost with 99% fat in a dry formula. It delivers energy more than twice that of carbohydrates, creating sustained stamina without starch or sugar. The product is designed for performance horses, hard keepers, or seniors who need extra calories without behavioral side effects. The fat sources come from vegetables, delivering cool-burning calories to help hard keepers gain or maintain weight without excessive grain.
Purina Amplify High-Fat Horse Supplement

Amplify combines added antioxidants, including Vitamin E, with a balanced mix of protein, vitamins, and minerals. Its highly palatable formula supports skin health and a shiny coat while promoting easy digestion through a proprietary extruded particle that aids calorie absorption. The high-fat blend is designed to provide a robust energy intake without excessive grain and with digestion-friendly characteristics.
Manna Pro Simply Flax for Horses

100% pure ground flaxseed provides a natural source of omega-3 fatty acids to support skin, coat, and overall wellness. This flax supplement emphasizes healthy skin and coat condition, with potential immune support and resilience. It is a straightforward, natural option for horses needing essential fatty acids without additives, contributing to shine and coat vitality year-round.
Farnam Weight Builder Weight Support

Weight Builder is a high-fat formula designed to maintain optimal weight and body condition. It contains 50% fat to deliver more calories per equal weight than many feeds, minimizing feeding volume. The product focuses on delivering easily digestible calories with no added sugar, reducing the risk of digestive upset while promoting caloric intake for weight gain and maintenance.
Buying Guide: Key Purchase Considerations
- Goals and horse type: Match fat content and energy delivery to age, activity level, and weight status (senior, performance, or hard keeper).
- Fat source and digestibility: Look for high-quality fats (vegetable-based or flax-derived) with digestible formulations to minimize GI upset and maximize absorption.
- Starch and sugar content: Prefer low-starch and low-sugar options for horses prone to metabolic issues or insulin sensitivity.
- Additional nutrients: Some products include probiotics, biotin, antioxidants, or omega-3s; weigh these against your horse’s needs and any vet recommendations.
- Coat, skin, and hoof support: If coat shine and hoof integrity are priorities, consider products with omega-3s and biotin.
- Administration and palatability: Choose palatable formulas with easy mixing or feeding methods to ensure consistent intake.
- Veterinary guidance: For senior horses or those with health concerns, consult a veterinarian to tailor a fat-supplement plan that aligns with overall diet and medications.
- Long-term plan: Some products target immediate energy; others support sustained conditioning and recovery. Align with your short- and long-term goals.