Order within and have it by * in (edit)
Ship speed applies to in stock items, pending location. Does not include personalized items like engraving, embroidery, SmartPaks, or PortionPaks. Complete details on our Shipping Policies page.
SmartPaks help you take great care of your horse, so we take great care of you with SmartPerks! When you order your horse's supplements in SmartPaks, you're automatically* eligible for our FREE SmartPerks benefits, including:
  • Free ground shipping on what you want, when you want it
  • 10% off all SmartPak brand tack, apparel, and gear
  • A free Team SmartPak calendar, exclusive email offers and discounts, and more!
Learn more about SmartPerks
*At least one horse's individual SmartPaks must be over $40. Some exclusions apply.
Visit SmartPak.com/SmartPerks or call 1-800-461-8898 for details.
As a SmartPaks Subscriber, you can get free ground shipping all day, every day on just about everything we sell at SmartPak, thanks to your SmartPerks. The few add-on items we have can be shipped free by synching them with your horse's SmartPaks, shipping on a Barn Saver Shipping day, or by having a group of add-on items that total over $75.

Have a question?
Call 1-800-461-8898 or email CustomerCare@SmartPak.com anytime!
SmartFlex® Senior Pellets
SmartSupplements by SmartPak — Item #17472
  SmartPaks Over $40 Ship Free!
Free Shipping Thanks To
This item may be eligible for

Oops! Looks like you've already added this item to your order.

Please select a different recipient name if you'd like to create a new order, or give us a call - we're happy to help!

Best-selling senior formula

  • 7,000 mg of glucosamine, 500 mg of chondroitin sulfate & 50 mg of HA for healthy joints
  • 1,750 mg of devil's claw, 500 mg of boswellia & 300 mg of phenylalanine help manage discomfort
New & improved taste horses love! SmartFlex Senior Pellets were designed to support older horses in the three areas they need it most – joint health, digestive function, and antioxidants for a healthy immune system. For joint support, SmartFlex Senior Pellets provide 7,000 mg of glucosamine, 500 mg of chondroitin sulfate, 50 mg of hyaluronic acid, and 12,000 mg of MSM. This formula contains the herbs devil’s claw and boswellia, as well as the amino acid phenylalanine, to help manage discomfort. To support healthy digestion, SmartFlex Senior Pellets provide probiotics, prebiotics, and enzymes. And because senior horses benefit from extra antioxidants, this formula also contains vitamin C and super oxide dismutase. This outstanding formula is a customer favorite, and your horse will love the tasty pellets!  For even more comprehensive senior support, consider our multi-purpose formula SmartCombo Senior.

View our Joint Supplement Comparison Chart
Find your horse's SmartFlex


Active Ingredients per 60 g:
(Maintenance Dose = 1 scoop (60g) daily)
  • Methylsulfonylmethane (MSM)
    12,000 mg
  • Glucosamine HCl (shellfish)
    7,000 mg
  • Devil’s Claw Extract
    1,750 mg
  • Chondroitin Sulfate (bovine)
    500 mg
  • Boswellia Extract
    500 mg
  • DL-Phenylalanine
    300 mg
  • Calcium Ascorbate (Vitamin C)
    275 mg
  • Fructooligosaccharides
    225 mg
  • Super Oxide Dismutase (bovine)
    100 mg
  • Sodium Hyaluronate
    50 mg
  • Pancreatin 8x (supplying Amylase, Protease, Lipase)
    30 mg
  • Profloratin® (a proprietary blend of L. acidophilus, L. casei, E. faecium and B. longum)
    4.7 billion CFU
Inactive Ingredients:: Alfalfa Meal, Corn Distillers Dried Grains with Solubles, Lignin Sulfonate, Magnesium Silicate, Maltodextrin, Sodium Propionate, Vegetable Oil (cold pressed), Vitamin E.


Instructions for Use:
Horse Weight Recommended Amount
Under 500 lbs. 0.5 scoops
500 - 1000 lbs. 1 scoop
1000 - 1500 lbs. 1 scoop
Over 1500 lbs. 1.5 scoops
Directions for Use: Administer 60 g daily, 1 scoop = 60 g


SmartFlex Senior Pellets

Clinical Research

You Might Like
    Customers Also Shopped For
    "Farrier's Magic FLEX-n-ACTION Pelleted Joint Product supplies researched ...
    "Farrier's Magic FLEX-n-ACTION Pelleted Joint Product supplies researched ingredients including glucosamine HCl, hyaluronic acid, chondroitin sulfate, and generous levels of ultra pure MSM. All of these connective tissue components are blended in a very palatable base of premium quality timothy-based ...
    "Chondrogen EQ™ is suitable for all breeds of ...
    "Chondrogen EQ™ is suitable for all breeds of horses to support joint health and flexibility. Molasses flavoring offers the horse a highly palatable product. EQ is recommended to support joint health and flexibility and normal cartilage health in any breed, ...
    "SmartVite Thrive provides the right selection of essential ...
    "SmartVite Thrive provides the right selection of essential vitamins and minerals to help meet your horse’s nutrient requirements for optimal health. This highly targeted formula is carefully designed to offer ideal nutrition for adult horses in light or no work. ...
    "Does your horse bug out when fly season ...
    "Does your horse bug out when fly season rolls around? If turnout is more like torture with all the buzzing and biting, SmartBug-Off can make the pasture peaceful again by helping to protect your horse from pesky insects. Say goodbye ...
    "The original oral hyaluronic acid joint supplement for ...
    "The original oral hyaluronic acid joint supplement for horses, in a flavored oral supplement. HA is a substance that helps maintain normal, healthy joints. Conquer Gel is veterinarian-researched, developed, and tested to ensure quality. Suitable for all breeds, sports, and ...
    "Vitamin E and Selenium are important antioxidants that ...
    "Vitamin E and Selenium are important antioxidants that work together to support a healthy immune system and help neutralize free radicals, the damaging by-products of normal cellular activity. While vitamin E is found naturally in fresh grass, levels begin to ...
    "MSM is a naturally occurring sulfur compound known ...
    "MSM is a naturally occurring sulfur compound known for its ability to help horses with stiffness and discomfort associated with exercise and normal daily activity. In addition, this economical supplement may help with itchy skin due to environmental or seasonal ...


    out of 5
    94% of customers would recommend this product to a friend!
    Tell us what you think!

    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.

    • Review 0
    • Votes 0
    • Discipline:
    • Expertise:
    • Product
    • Competitor:


    SmartFlex® Senior Pellets is rated 4.7 out of 5 by 1364.
    Rated 4 out of 5 by from It works! This stuff works both as a curative and a supplement. My 16-year-old mare put her hoof through a wire fence and had cuts, bruises and pulled muscles. I bought the SmartFlex to help her heal. She was on it for a week and I noticed improvement. She has healed completely and I now give a maintenance dose. She moves like an eight-year-old, is comfortable and happy.
    Date published: 2016-10-29
    Rated 4 out of 5 by from Turn back clock with senior pellets! Vet suggested senior supplement that would ease joint discomfort. Smart flex Senior is a great way to provide the needed nutrients without breaking the bank.
    Date published: 2016-10-28
    Rated 5 out of 5 by from Works good I bought this a month ago and see an improvement in my older horse's comfort.
    Date published: 2016-10-24
    Rated 5 out of 5 by from my palomino is 30 and still going strong! My horse has been receiving this supplement for several years. He remains strong and canters around the paddock like a youngster.
    Date published: 2016-10-18
    Rated 5 out of 5 by from Makes my senior mare feel young again! Switched my 26 year old mare from glucosamine injects to the smartflex senior pellets. Wasn't seeing much difference from the glucosamine so that's why I wanted to try something new. My mate has never really acted her age, just a little stiffness coming out to work and in the mornings, but I am really impressed with these pellets. She's the rowdy one in her turnout group now! Her gimp/stiffness starting out is practically gone. Very happy I switched:)
    Date published: 2016-10-14
    Rated 5 out of 5 by from Happy Horse I purchased this about a month ago and my 18 year old mare is so happy. She is a lesson horse and had been showing the signs of some joint discomfort but is back to her happy healthy self.
    Date published: 2016-10-14
    Rated 5 out of 5 by from Mare with ringbone I have an 18 yr old mare with ringbone. Special shoeing helped some, but the horse was still in pain, some days more than others. After much research on various supplements to help with pain, I decided to try SmartFlex Senior Pellets and extra MSM. She now walks without limping and is much more comfortable. I love the individual packaging, as it is so easy to use and stays fresh. She eats the pellets without waste, too. I was teetering on whether or not to put her down, as I don't want her to live in constant pain, but the supplements have helped so much, that I don't have to make that decision at this point.
    Date published: 2016-10-11
    Rated 5 out of 5 by from Great results! My horse was originally on the herb-free pellets. I switched her because showing isn't really in our future. At 24, she moves like she is years younger. I'll never get tired of hearing someone exclaim, "She's HOW OLD?" after seeing her under saddle.
    Date published: 2016-10-11
    Rated 5 out of 5 by from A Senior Must!! I have a 40 year old Quarter Horse that is a real part of our family. I decided to give it a try to help the old girl get around a little better. Certainly glad I tried it. She loves it (unlike others that I have tried). Although at that age she is still slow moving, I can see a bit of "pep in her step". Anything for our old girl :) Yes, it does cost a little more, but just the fact that there is absolutely NO WASTE, is the perfect solution for me to help an old friend out.
    Date published: 2016-10-03
    Rated 1 out of 5 by from Easy to give and horse loves it! Bought this a month ago for maintenance and my horse lives it!
    Date published: 2016-09-29
    Rated 5 out of 5 by from Came super fast I bought this for my 19 year old OTT because my vet recommend I start giving him something with glucosamine MSM And C for preventing any future problems. And this has all 3. I use to just give him MSM but this one is a lot better
    Date published: 2016-09-21
    Rated 5 out of 5 by from cheaper by the larger size
    Date published: 2016-09-13
    Rated 5 out of 5 by from Excellent I bought this to simplify and reduce the number of supplements for my horse. One supplement that covers many bases is fantastic especially when it has Smartpak's quality.
    Date published: 2016-09-12
    Rated 5 out of 5 by from Great product I got this a month ago. I have a 20 year old gelding and he acts like he feels good. He runs and plays with the other horse which is 8 years old
    Date published: 2016-09-09
    Rated 5 out of 5 by from
    Date published: 2016-09-08
    Rated 5 out of 5 by from
    Date published: 2016-09-08
    Rated 5 out of 5 by from
    Date published: 2016-09-05
    Rated 3 out of 5 by from Just So-So After almost 2 months of daily SmartFlex Senior Pellets, I didn't notice any difference in my horse. He isn't a picky eater, but he hated these. I had to use more than his daily ration of grain to get him to eat the pellets. (He's insulin resistant, so sugary additions weren't an option.) He's 21 and perhaps it's because he didn't have any debilitating age-related joint or immune system issues, but it's really not worth it for us. I will keep him on the Smart Hoof Pellets, since they seem to be working very well.
    Date published: 2016-08-31
    Rated 5 out of 5 by from Great product! My 23-year-old horse has been on this supplement for about a month. I can tell a huge difference in the way he moves. He had a slight limp that seems to be gone. He seems more energetic, too. Finally, he LOVES the taste!!
    Date published: 2016-08-29
    Rated 5 out of 5 by from Helps with arthritis I used this on my new 12 year old rescue mare that arrived with arthritis in her hocks. It has helped her overall.
    Date published: 2016-08-27
    Rated 5 out of 5 by from Great product! Purchased for a new horse and he has been on it a month now and doing great!
    Date published: 2016-08-26
    Rated 3 out of 5 by from Works but has some drawbacks This product is reasonably priced and seems to be working but it has a funky smell to it. One of my horses was reluctant to eat it. It also states that medications may be slower to work if fed with the product.
    Date published: 2016-08-20
    Rated 5 out of 5 by from
    Date published: 2016-08-19
    Rated 5 out of 5 by from Works fast Started using this product in hopes of giving my draft cross some relief from discomfort due to developing ringbone. After just 3 weeks I noticed a marked change in his willingness to play and run.
    Date published: 2016-08-18
    Rated 4 out of 5 by from Okay soo.. It's not that this product didn't work it's just that I don\und that putting my horse in a new environment and giving her a smaller amount of grain worked better then having her on these supplements. She was not on any grain or supplement before this because she had had problems with her weight, she would simply eat until she could not eat anymore. But she lost weight over the winter and I was worried she would not be able to gain it back for the upcoming winter. Because is was out on grass everyday, but seem I got this supplement and I was giving it to her with sweetened she looks awesome and gain the right amount of weight so she is heathy but not over weight. Also her mood has improved greatly. But I went a week not giving her the supplements and just a small amount of grain and there was no change her mood and disposition was still good and happy.
    Date published: 2016-08-18
    Rated 1 out of 5 by from NOT for sensitive stomachs My horse was on it for two months and it stressed his stomach. Had the vet out and she told me to switch to the herb free.
    Date published: 2016-08-16
    Rated 5 out of 5 by from More comfortable! I've used this on two different horses - 2 years each. In both cases the horses were more comfortable when fed SmartFlex Senior.
    Date published: 2016-08-13
    Rated 5 out of 5 by from These really help. I have been feeding my senior horses these for over 2 years with great results. Really helps these older arthritic horses being less stiff and more fluid in movements. Even the real picky 26 year old eats it.
    Date published: 2016-08-12
    Rated 5 out of 5 by from Supplements working! Thank you for tecommending these supplements. I really appreciated the time, effort, and graciousness of the staff when they helped me pick out the best fitting supplement for my horse's needs!great product! Great job everyone!
    Date published: 2016-08-12
    Rated 5 out of 5 by from My older fella is looking like a younger model My 23 YO quarter horse was losing top line and getting ribby. Couldn't get the weight back on him. Digestive system was a little sensitive. My trainer and friend recommended this supplement and it finally made the difference I was looking for.
    Date published: 2016-08-03
    • y_2017, m_2, d_26, h_22
    • bvseo_bulk, prod_bvrr, vn_bulk_0.0
    • cp_3, bvpage2n
    • co_hasreviews, tv_183, tr_1181
    • loc_en_US, sid_7472, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_smartpak

    Q & A

    Healthy Horses  ❤  Happy Riders