Gaining weight safely is a common goal for many horse owners, whether the aim is to support aging horses, hard keepers, or performance athletes. The following products are designed to deliver concentrated calories, balanced nutrition, and gut-friendly ingredients to help horses improve body condition and muscle tone without overstressing the digestive system. Below are five well-regarded options with features tailored to equine needs across different ages and activity levels.
| Product | Brand | Key Benefit | Form |
|---|---|---|---|
| Manna Pro Weight Accelerator | Manna Pro | High fat, omega-3 enriched weight gain for seniors | 8 lb bag |
| Horse Guard Super Weight Gain | Horse Guard | Comprehensive weight and vitality boost with prebiotics/probiotics | Weight gain supplement |
| Formula 707 Weight Gain Daily Fresh Packs | Formula 707 | Palatable, calorie-rich daily portions for hard-to-keep horses | 28-day supply |
| Formula 707 Weight Gain Crumble | Formula 707 | Palatable crumbles with fat and protein for muscle support | 7 lb bag |
| Manna Pro Cool Calories 100 | Manna Pro | Concentrated fat-based energy for seniors and performers | 8 lb bag |
Manna Pro Weight Accelerator For Senior Horses

Manna Pro Weight Accelerator is crafted for senior horses, delivering high fat and calorie content to support healthy weight gain and maintained body condition. Its omega-3 fatty acids, sourced from flaxseed, help promote a glossy coat and skin hydration, while a senior-focused blend includes probiotics, biotin, and controlled starch to support digestion, hoof strength, and joint mobility in aging horses. This topper integrates easily with current feed programs to enhance energy without drastic dietary changes.
Horse Guard Super Weight Gain

Horse Guard Super Weight Gain combines nutrients to support healthy weight and vitality. The formula emphasizes balanced mass development with enhanced protein and fat intake, plus prebiotics and probiotics that aid digestion. It aims to improve overall condition, coat shine, and muscle tone, helping horses meet energy demands with a steady, gut-friendly approach. Use alongside a consistent feeding routine to help horses gain weight without erratic digestive responses.
Formula 707 Weight Gain Daily Fresh Packs

Formula 707 Weight Gain Daily Fresh Packs provide convenient, palatable portions that deliver calories and essential amino acids for muscle development. The product uses vegetable fat for easily digestible calories and supports energy production, while high-quality protein contributes to lean mass. The fresh-pack format helps keep nutrients stable during travel or competitions, making it suitable for hard keepers and senior horses who benefit from reliable daily nutrition.
Formula 707 Weight Gain Crumble For Horses

Formula 707 Weight Gain Crumble offers a palatable, calorie-rich supplement designed for diverse horse types, including hard keepers and seniors. These crumbles provide easily digestible calories via vegetable fat and supply high-quality protein for muscle development. They are not pellets, which can influence palatability and acceptance for some horses, and are convenient for mixing with regular feed to boost energy intake without excessive volume.
Manna Pro Cool Calories 100

Cool Calories 100 is a concentrated dry fat supplement that delivers 99% fat, offering energy without added sugar or starch. It is particularly suitable for performance horses, hard keepers, and seniors who need extra calories from fat sources. The slow-release energy supports stamina and body condition while keeping digestive upset to a minimum, helping horses maintain weight during intense training or periods of limited forage.
Farnam Weight Builder

Farnam Weight Builder focuses on maintaining optimal body condition with a high-fat formulation. It emphasizes providing calories without added sugar, supporting weight gain while reducing the risk of digestive upset. The product’s fat-centric approach helps increase overall energy density per feeding, which can be beneficial for horses needing steady weight gain without large-volume feeds. It complements ongoing feeding plans by boosting caloric intake in a controlled manner.
Buying Guide: Key Considerations For Choosing A Weight Gain Supplement
- Horse health and age: Seniors may benefit from lubricated fat sources and gut-friendly ingredients like probiotics, while younger hard keepers may tolerate higher starch levels if digestive health is monitored.
- Calorie density vs. volume: Concentrated fat-based formulas deliver calories with smaller volumes, which can reduce gut load and help manage appetite. For some horses, larger-volume cereals might be necessary.
- Fat source and digestibility: Look for vegetable fats, flaxseed-based omega-3s, and slow-release fat to support energy without spikes in blood sugar or behavioral issues.
- Protein and amino acids: Adequate protein supports muscle development and recovery. Check the protein-to-energy balance to avoid excess non-structural carbohydrate intake.
- Digestive support: Probiotics and prebiotics can aid digestion and gut health, essential for weight gain programs that alter feeding quantity or frequency.
- Palatability and form: Daily packs, crumbles, toppers, and liquids vary in acceptance. Choose a format the horse readily consumes to ensure consistent intake.
- Feeding program integration: Consider how the supplement fits with existing forage, grain, and supplement regimens. Start with small adjustments to monitor tolerance.
- Monitoring outcomes: Track weight, body condition score, coat condition, and energy levels over 4–8 weeks to evaluate effectiveness and adjust as needed.