Skip to content
PLEASE NOTE: You may experience errors on our site when using Internet Explorer. Please consider updating your browser, or download Google Chrome.

Muscle & Weight Gain Supplements for Horses

The right nutritional support may help your horse look, feel, and perform his best. Look for “cool” calories from healthy fats in weight gain supplements, targeted ingredients for muscle recovery, and key amino acids to help build strong, healthy muscles.

Available in SmartPaks clear

Brand clear

View all

Ingredients clear

View all

Avg. Customer Rating clear

(36)
select your star rating

Price Range clear

Form clear

View all

SmartPerks Free Shipping clear

Picky Eater Approved clear

Deals clear

SmartPerks
SmartPerks are the awesome collection of FREE benefits available when you put your horse's supplements on AutoShip* including:
Get SmartPerks pricing today by activating your FREE SmartPerks Benefits!* Here's how:
1) Enter the promo code PERKS during checkout
2) Look for your FREE benefits, including:
SmartPerks are the awesome collection of FREE benefits available when you put your horse's supplements on AutoShip* including:
  • 10% off all Smartpak brand tack, apparel, blankets, and more
  • Free shipping every day
  • Exclusive sales & discounts delivered straight to your inbox
Congratulations - your SmartPerks have already been activated!
* To be eligible for SmartPerks benefits, at least one supplement bucket/bag, or one horse's individual SmartPaks must be over $40. AutoShipping bags/buckets must ship within one multiple of the standard days supply to qualify. Some exclusions apply. call 1-800-461-8898 for details.

Customers Also Shopped For

Renew Gold™

Description:
Renew Gold gives horse owners the opportunity to utilize the nutritional advantages of Stabilized Rice Bran in an even more effective, advanced formulation. The unique combination of stabilized rice bran with CoolStance® Coconut Meal, Flax, and Fermented Yeast Culture allows ...

Leg Up® Combo Pellets

Description:
Leg Up® Combo Pellets provide four key areas of support in easy-to-feed pellets.  This formula includes glucosamine, chondroitin sulfate, and MSM for joint health, along with biotin and minerals for strong hooves. Leg Up Combo Pellets also include probiotics and ...

Leg Up® Calm Pellets

Description:
Supplements in this category may be a good choice for horses that are dealing with excess nervousness or tension. This formula includes herbal ingredients that offer basic support for nervous system health and maintaining an even temperament.   If you ...

Sainfoin Premium Equine Forage Pellets

Description:
Sainfoin is an ancient forage legume. It was so beloved by Queen Victoria that she named her first colt born at Hampton Court, "Sainfoin". Each 40lb bag contains 100% premium sainfoin with no harmful binding agents or preservatives. Sainfoin forage ...

SmartCombo™ Senior Pellets

Description:
SmartCombo Senior Pellets provide support for joints, hooves, and skin & coat in one easy-to-feed supplement. This multi-purpose formula contains glucosamine, hyaluronic acid, MSM, devil's claw, biotin, omega 3 fatty acids, probiotics, prebiotics, enzymes, and more. Get your senior horse’s ...

Relax Blend™

Description:
Relax Blend™ is excellent for helping the stall bound and unpredictable type of horse maintain a calm attitude. The targeted blend of ingredients helps horses stay focused in stressful situations. This herbal supplement is a popular addition to the regimen ...

CocoOmega™ Oil

Description:
CocoOmega provides concentrated ingredients for hair, skin, hoof, joint, and immune health. A blend of omega-3 rich flax seeds, chia seeds, and fish oil create a 4:1 ratio of omega-3 to omega-6 fatty acids, mirroring the ratio found in grass ...