Farnam Weight Builder Weight Support Supplement for Horses, 22.5-lb, 90 Day Supply

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About This Item

Details

  • Nutritionally balanced, high-fat formula helps your horse maintain an optimal weight and body condition.
  • Provides easily digestible calories with no sugar added to safely add calories without the risk of digestive upset.
  • Promotes healthy skin and a glossy coat with omega-3 fatty acids from flaxseed meal and heat-stabilized rice bran.
  • Delivers controlled energy to help horses reach and maintain their performance demands.
  • Palatable, easy-to-feed powder mixes in easily with your horse’s regular grain ration.

Ingredient Information

Feeding Instructions

Support for Every Age and Every Stage

Whether you have a pregnant or nursing mare, a growing foal, or a horse that needs help maintaining weight, Farnam offers a selection of supplements to support their health and keep them strong and thriving at every stage of life.

Calories Without Risk of Digestive Upset

Weight Builder Weight Support supplement supplies extra calories for weight maintenance or performance. Formulated with 50% fat, it provides easily digested calories without the risk of digestive upset associated with feeding extra grain.

Keep Mares in Optimal Body Condition

Mare Plus Gestation & Lactation supplement is designed to help keep pregnant and lactating mares in optimal condition. Formulated with important nutrients, it supports mares and foals through fetal development and during lactation.

Give Foals the Nutrition They Need

Grow Colt Growth & Development supplement supports healthy growth and development in the first years of a foal's life. Formulated with 27 essential vitamins and minerals, it also supports immune health and bone and connective tissue development.

About Farnam

For over 75 years, Farnam has been a leader in equine care. Their mission is to continually strengthen the bond between horses and humans with simple, effective and innovative solutions that help make every moment of your life together better.

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Questions & Answers

8 Customer Questions


Is this safe for a horse with Cushings?

Answer by ChewyMar 23, 2021
The Weight Builder Equine Weight Supplement does not have any sugar added to the formula. We always recommend speaking to your veterinarian prior to changing your little one's routine. Your pet's vet is your best ally in managing any existing health conditions and sensitivities.

Can this be fed to a miniature horse? If so, what dosage?

Answer by ChewyJul 26, 2024
This supplement is ideal for performance horses, mature horses, underweight horses and seniors.

Will this also help with skin/coat condition?

Answer by ChewyMar 17, 2021
This powder supplement contains nutritious fats like omega 3’s to help your horse reach their ideal weight and promote healthy skin and a glossy coat.

How many calories does a serving contain?

Answer by ChewyJul 25, 2025
This supplement has a caloric content of 700 kcal/4 oz.

4.6
Rated 4.6 out of 5 stars
79 Ratings

26 Customer Reviews



Rated 5 out of 5 stars
Verified Purchase
By Ashley on Aug 25, 2025

Great product!

Used this product years ago on an older horse and it worked well. Trying it out on my 30 year old and have already noticed a difference in just a few days. Very

Used this product years ago on an older horse and it worked well. Trying it out on my 30 year old and have already noticed a difference in just a few days. Very impressed. Helps that he seems to love it.


Rated 5 out of 5 stars
Verified Purchase
By Cassidy on Jun 7, 2026

Noticeable improvement within a month

Super easy to incorporate into graining. I used it daily for a month straight using the recommended amounts for feeding, and had no issues with colic. My horse put

Super easy to incorporate into graining. I used it daily for a month straight using the recommended amounts for feeding, and had no issues with colic. My horse put on noticeable weight within 3 weeks. As a bonus, it seemed to gloss up her coat as well. An excellent option to get extra calories in during the winter, and/or working seasons. I also use it as a caloric supplement when out for back country trail riding trips.


Rated 5 out of 5 stars
By Karin on Jul 4, 2023

Excellent results !

My vet had suggested that my horse put on more weight before the winter 1922 . This product worked so well I no longer needed to give it to my horse in the spring

My vet had suggested that my horse put on more weight before the winter 1922 . This product worked so well I no longer needed to give it to my horse in the spring . Not to mention this product brought him out of winter with a gorgeous, shiny coat ! I highly recommend , and will probably use it again this coming winter . Which truthfully , I do not want to even think about right now !


Rated 5 out of 5 stars
Verified Purchase
By birdwatcher on Sep 2, 2022

Great stuff

I've been using this product along with Red Cell for years. I have a 37 yr old gelding and he has maintained his weight until this winter when I had to switch to

I've been using this product along with Red Cell for years. I have a 37 yr old gelding and he has maintained his weight until this winter when I had to switch to a better senior feed and increase his feedings to 3 times a day. His coat is good and he's healthy. He's gained all of his weight back and then some. I do suggest you research your horse's nutritional needs but this has worked for me. It smells so good too!


Rated 5 out of 5 stars
Verified Purchase
By Sheila on Aug 2, 2024

Good old boy

Okie is 30 years old. Has good teeth, but can’t keep weight on.

Okie is 30 years old. Has good teeth, but can’t keep weight on.


Rated 5 out of 5 stars
Verified Purchase
By Elissa on Oct 17, 2024

Does what it says

I have a 26 QH missing 2 molars. He is already getting yummy feed but I was still having trouble keeping weight on. I ad a scoop of this to his grain and it has

I have a 26 QH missing 2 molars. He is already getting yummy feed but I was still having trouble keeping weight on. I ad a scoop of this to his grain and it has helped him maintain weight


Rated 5 out of 5 stars
Verified Purchase
By Sandra on Jun 15, 2026

Farnam Weight Builder

I have used this in the past and it did help put weight on my very old horse. So I'm trying it again with another very old horse.

I have used this in the past and it did help put weight on my very old horse. So I'm trying it again with another very old horse.


Rated 5 out of 5 stars
Verified Purchase
By Kathy on Mar 14, 2022

My horse loves this

Vet recommended my horse who is sometimes a finicky eater gain a few pounds and a friend recommended Weight Builder. The horse loves it.

Vet recommended my horse who is sometimes a finicky eater gain a few pounds and a friend recommended Weight Builder. The horse loves it.


Rated 5 out of 5 stars
Verified Purchase
By Tonya on Jan 18, 2025

Great product for weight

I have a 29 year old mare who was very thin, started her on this 4 months ago she is doing amazing, highly recommend for senior horses.

I have a 29 year old mare who was very thin, started her on this 4 months ago she is doing amazing, highly recommend for senior horses.


Rated 4 out of 5 stars
Verified Purchase
By Eric on Mar 4, 2025

Horse help

The horses love the taste and adds little bit more in the tank in the cold weather adding to weight staying on

The horses love the taste and adds little bit more in the tank in the cold weather adding to weight staying on