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SmartFlex® Senior Pellets

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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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Product Overview

Which horses benefit from senior joint support?

Normal aging and years of work can really take a toll on joints, causing stiffness and discomfort that can make a senior horse’s life more difficult. By providing your old friend with joint support designed to help keep him comfortable, you’re showing him how much you love him and appreciate the years you’ve shared. 

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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

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  • Choose Your Flex: SmartFlex® Senior
    Not sure which SmartFlex® formula is the best one for you? Watch this short video & see if SmartFlex Senior is right for you and your horse.
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    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.

SmartFlex® Senior Pellets is rated 4.7 out of 5 by 1579.
Rated 5 out of 5 by from Great supplement, I noticed a big change My 13yo OTTB gelding has been on this for about a month. He's arthritic (average what you'd expect for a teenage OTTB in full work), and he has mild KS. I had read elsewhere that devil's claw was a good ingredient for mild pain associated with KS, plus I liked that this has all of the standard joint supplement ingredients. It's affordable and palatable. My horse is a semi picky eater, he's funny about strong smells or a large amount of powder. This is pelleted and doesn't have a strong smell at all. He didn't even notice it in his grain. I noticed a difference within a week or so. My horse tends to get tense, anxious, and hollow in cold weather due to discomfort, and he became a lot more relaxed, soft, and elastic after being on this. I am combining this with a separate dose of pure MSM for the winter months, which has helped him even more. The only downside of this supplement is that it's not USEF legal. If you're not showing, it's definitely worth trying! That is the only reason I switched to something else.
Date published: 2022-01-04
Rated 5 out of 5 by from Great product for maintenance of senior horses I use this supplement for all of my senior horses as a part of their regular support care. I do find that it seems to make them more comfortable. My pony is a bit of a picky eater and he happily scarfs this down.
Date published: 2021-12-27
Rated 5 out of 5 by from Improved Comfort!!!! I have been using this product for over a year now for 2 of my horses. My 24yr old morgan has always had a gimp at a trot in his later years, but last year it was noticeable while riding so I started him on it and it improved so much. This summer I upped his dosage, because why not and my family noticed he does NOT limp anymore even while riding. My 20yr old QH has had leg problems due to confirmation problems since he was young, but was never lame. We noticed a change a year and a half ago that his weird stance started to become more normal. Last year his hind legs when weight was placed on them they would pop (to go into the normal weight-bearing position) and even I could feel it while riding him. I placed him on these supplements and in the span of a week he was my normal riding, jerk of a horse. Even this year he felt great during the summer and it made me so happy. This product is a lifesaver.
Date published: 2021-12-15
Rated 5 out of 5 by from Improving my horses comfort! I started my 20 year old gelding on this supplement a little over a month ago and within 2 weeks, I was seeing improvement. My horse has struggled with on again, off again lameness for the past two years particularly in the winter months. This past summer, his lameness was recurrent despite warmer weather. I truly feel like the joint support along with Yucca and Devil's Claw are helping ease that inflammation and keeping him more comfortable as the weather changes. I know I will need to wait a full 4 months or so before I can definitively say it has made a difference, but I'm already seeing improvement! Grateful to have found this product and how easy SmartPaks make it for me to make sure I always have it on hand and to dispense! My horse gobbles it!
Date published: 2021-12-06
Rated 5 out of 5 by from Love it! We have our four on it. One has bad arthritis and you can tell this helps alleviate the pain he’s felt. They’ll all eat it without grain and we’ve got some picky eaters!
Date published: 2021-10-20
Rated 5 out of 5 by from Gleaming coat and youthful gait We are pleased with the results we see in our older mares (ages 18 - 32). They are maintaining appropriate weight, moving freely, have glossy coats, are energetic, and are holding their youthful vitality. We love SmartFlex Senior Pellets!
Date published: 2021-08-25
Rated 5 out of 5 by from loosening joints! cricket came to me , unknown age...mature skinny, spine and hip bones showing very little activity except Grazing! She is stiff in front right ankle and both hocks. she was overused and not fed much. so on a good feeding program and asked smartpak for help choosing something to make her comfortable. we have been on Flex senior pellets for two months and Cricket is blossoming. a friend said she glows now! never rushes to the barn but is definitely using all her joints! cant wait to see what the next two months will look like! Thank you!!
Date published: 2021-08-25
Rated 5 out of 5 by from Lameness gone!! My gelding has had off and on lameness for years, vet said laminitic(mechanical, not dietary), but he was consistent with heel pain. After two months on this supplement (with yucca saponin as well) he is sound!!! Acting much more like himself and trotting out in pasture again!! This supplement has CHANGED HIS LIFE and given him another chance. Thank you smartpak!!
Date published: 2021-08-07
Rated 4 out of 5 by from On our second month, Jazzie seems to have more energy and is happier going to keep giving him the Smart Pak
Date published: 2021-07-19
Rated 5 out of 5 by from This stuff worked for my 30 yo gelding! I bought this supplement because I needed something for my 30 year old gelding that would come out of the stall sore and stiff. I wanted something that would make him feel better. After about a month, I noticed a big difference in him! He now walks out of the stall without any stiffness or soreness! He also is much more active when he is in the pasture! Smartflex Senior has been a lifesaver for my horse Pepper!
Date published: 2021-07-05
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