Best Horse Weight Building Supplements Under $100 (2026)
Selections were ranked by value score using ingredient transparency, formulation purpose (weight gain vs. muscle), palatability, and price under $100
The Verdict
- Best Overall: Formula 707 Weight Gain Crumble for Equines — Best for calorie boost: a palatable crumble designed for easy top-dressing and steady weight gain
- Best Value: Formula 707 MuscleMx Equine Supplement – Conditioning & Muscle Builder — Best for muscle conditioning: targeted amino-acid blend formulated to support conditioning and muscle development
- Best Premium: Formula 707 MuscleMx Equine Supplement – 10 lb — Best large-batch muscle support: conditioning-focused formula in a larger size for ongoing muscle-building programs
Top Picks
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1
Best Overall Formula 707 Weight Gain Crumble for Equines
Best for calorie boost: a palatable crumble designed for easy top-dressing and steady weight gain
Palatable, calorie-rich supplement to support weight and energy in hard-to-keep and senior horses. Customers note effective weight maintenance and palatability, with praise for quality
- calorie-rich formula
- palatable crumble
- supports weight and energy
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2
Best Value Formula 707 MuscleMx Equine Supplement – Conditioning & Muscle Builder
Best for muscle conditioning: targeted amino-acid blend formulated to support conditioning and muscle development
Equine supplement that supports conditioning and muscle mass with amino acids and energy aids. Key benefit: supports muscle-building metabolism. Customer insight notes mixed/none previously observed
- lysine for muscle proteins
- gamma oryzanol for weight gain
- okg for metabolic support
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3
Body Builder 4000 Horse Weight Gain Supplement
Best balanced macronutrients: formulated to combine fat and protein support for gradual, healthy weight gain
High fat and energy horse weight builder with body conditioning vitamins. promotes weight gain and muscle recovery with improved hoof quality; suitable for lactating mares to maintain body weight. Noted for shiny coat and growth support
- 40% fat content
- 26% protein content
- designed for weight gain and muscle building
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4
UltraCruz Equine Weight Gain 1 Gallon
Best liquid option: concentrated weight-gain formula that mixes easily for horses that prefer liquids
Equine weight gain supplement in a 1 gallon container. Helps support weight gain in horses. Customer note mentions its use for weight management
- weight gain support
- 1 gallon container
- horse-specific supplement
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5
Best Premium Formula 707 MuscleMx Equine Supplement – 10 lb
Best large-batch muscle support: conditioning-focused formula in a larger size for ongoing muscle-building programs
Eq muscle-building supplement for conditioning and definition in horses. Supports metabolism and muscle-building with lysine, gamma oryzanol, creatine, and OKG. Customer insight notes mixed signals on satisfaction
- multi-ingredient muscle support
- lysine for protein synthesis
- gamma oryzanol for weight and muscle formation