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SmartMuscle® Mass Pellets

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Feeding Chart

Daily Serving

Dog Weight - lbs Inactive Dog Active Dog Working Dog
Inactive Dog - Less than 30 minutes of vigorous exercise daily
Active Dog - At least 30 minutes of vigorous exercise daily
Working Dog - More than two hours of vigorous exercise daily
This is only a guide. Please consult your veterinarian to determine the perfect feeding amount for your dog.
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Please call 1-800-461-8898 to order this product.
Only SmartPaks on AutoShip make you eligible to apply for the FREE ColiCare Program. Colicare is a free program that provides up to $15,000 in colic surgery reimbursement
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Product Overview

Which horses benefit from muscle building support?

Every horse owner wants their partner to have strong, healthy muscles to power performance; whether that means jumping the course, winning the halter class, or hitting the trail. Supplements in this category provide the building blocks needed for lean muscle development and are a great way to ensure your horse your horse has the right nutritional support to make the most of his exercise program.

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Key Ingredients


Supplement Facts

Ingredient Name Amount Per Serving
Ingredient Name Amount Per Pound

Ingredient Details


Weight Recommended Amount Loading Amount

How the Ingredients Work


Supporting Success

Supercharge Your Supplements

  • Christine McCrea and Tim McQuay on SmartMuscle Mass Equine Supplement
    Team SmartPak Riders, Christine McCrea and Tim McQuay, talk about why they trust the health of their top horses to SmartMuscle Mass ( Want your horse to be powered by SmartSupplements, too? Order today at
  • Simplify with SmartPaks | Consistent, Custom, Convenient
    Simplify your life with SmartPaks: custom-made, pre-measured daily doses of your horse's supplements.


The reviews provided on this website represent the experience of the individual posting the review. We do not adopt, edit, or endorse any of the submissions posted within the reviews section. Rather, the reviews are part of an online community of animal owners that desire to share their particular experience with other individuals. These reviews are not a substitute for discussing the health of your animal with a veterinarian.

SmartPak customers are some of the most conscientious animal owners around. We encourage you to share your experience with the products we sell to help fellow customers to make informed choices for their animals. We do not edit these reviews in any way - they are direct customer-to-customer communication. We do monitor reviews for positive and negative feedback, and use this feedback to improve our selection as well as sharing feedback with product manufacturers to help them improve their products. Please note that we recommend consulting your vet with serious health issues.

SmartMuscle® Mass Pellets is rated 4.5 out of 5 by 373.
Rated 5 out of 5 by from I swear by this product! I bought this a month ago for my filly in training and am so happy with the results. Muscle recovery is essential for young ones on strict training schedule. She's filling out so nicely. I have peace of mind knowing that my girl is getting exactly what she needs to maintain her health and wellness.
Date published: 2023-10-10
Rated 5 out of 5 by from YES. WORTH IT. DO IT I notice big differences in my mare, my trainer has noticed, and my saddle fitter too. While it won’t make miracles happen, will support big improvements. I have my mare on it for 2 months and then rotate off. And then do it as needed for a month or two. Big improvements.
Date published: 2023-07-14
Rated 5 out of 5 by from Great product to help a horse bulk up! I have had my show horse on this supplement for about 5 months. I started to notice a huge difference on month 2. He has been a hard keeper and a very lean muscle type of horse. This supplement has helped him develop more neck muscle, develop over his top line more, and has helped bulk up his hindquarters. This supplement is definitively worth it!
Date published: 2023-07-05
Rated 5 out of 5 by from Love it! Definitely can tell a difference it has helped a ton with my mares top line and just gaining muscle over all!
Date published: 2023-05-30
Rated 2 out of 5 by from Not for picky eaters! I have had my mare on this for a month now and every morning, she picks around every single pellet of this (granted she is a bit dramatic) but it is such a bummer because I was so excited to see the results on her OTTB top line, but she just hates it too much to even touch it.
Date published: 2023-05-30
Rated 5 out of 5 by from Helped my OTTB build a great top line! My OTTB has been on this for about 6 months now after needing to go on a pretty strict diet due to allergies and no longer being able to have most grains. In combination with ration balancer and a few other supplements, he has the best top line and overall muscle definition that he's ever had despite being in the same amount of work.
Date published: 2023-04-17
Rated 5 out of 5 by from I swear by this stuff I have used this supplement on two different thoroughbreds with amazing results each. It fills in top line, hindquarters, and all the necessary areas quickly. Noticeable difference before one month was up. Helps overall appearance, shine, and weight gain as well. This product works, very happy with it.
Date published: 2023-01-10
Rated 5 out of 5 by from Has made a difference! My horse recently lost a lot of topline and I’ve been giving her this for about a month and a half. I have noticed a difference in it not being so bony and it’s starting to fill out again.
Date published: 2022-12-13
Rated 5 out of 5 by from Superior muscle builder I used this over a period that my horse wasn't in work, as I didn't want him to lose too much muscle and was super happy with the results after a few months of feeding this. I switched to a lower cost (Leg Up) supplement, and have noticed a decrease in his condition. Its expensive, but it works! Switching back to this for the foreseeable future.
Date published: 2022-12-06
Rated 5 out of 5 by from Everyone Sees the Difference I bought this product because I saw it being used on another horse in my barn and he was nice and muscular. I started feeding it in May while I was home over the summer. At first, I wasn't sure if the supplement wasn't making a difference, or I just didn't see the change it made because I saw my horse every day. When I moved back to school in August everyone said that my horse looked great, like he'd really filled out and grown up over the summer. Just yesterday I sent a photo of him to someone who hadn't seen him since May and they said they didn't even recognize him at first because he has so much more muscle. Unfortunately, I don't have a before photo for comparison, but I think its safe to say that the supplement helped him gain muscle over the past few months.
Date published: 2022-11-02
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