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, ...
    "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 ...
    "In addition to providing key ingredients for healthy ...
    "In addition to providing key ingredients for healthy joints, Recovery EQ was developed to support healthy circulation, aid in normal healing, and help combat tissue stress. The primary active ingredient of this unique formula is Nutricol®, a potent blend of ...
    "Antioxidants may help your horse's body fight the ...
    "Antioxidants may help your horse's body fight the damaging effects of free radicals and oxidative stress. SmartAntioxidant Pellets are a potent, cost-effective antioxidant formula containing vitamin C, vitamin E, grape seed extract, super oxide dismutase and citrus bioflavonoids. SmartAntioxidant Pellets ...


    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 1373.
    Rated 5 out of 5 by from My horse Tory has been taking this for about 3 months now and I can see much improvement in her mobility.
    Date published: 2017-03-13
    Rated 5 out of 5 by from I started my mare on this a little over a month ago. She recently turned 16 and I wanted to give her a little extra support as she still competes and can come out a little stiff. I have already noticed a significant improvement in her looseness from when I get on. The evenness of her gait has improved and she overall seems more comfortable. She ate it not problem from the first time I gave it to her, but she also eats just about anything.
    Date published: 2017-03-08
    Rated 5 out of 5 by from Works great! I bought this for one of my older horses and it has worked tremendously!
    Date published: 2017-03-06
    Rated 5 out of 5 by from Love this Product My trainer suggested this and already seeing results
    Date published: 2017-03-01
    Rated 4 out of 5 by from
    Date published: 2017-02-25
    Rated 5 out of 5 by from I just finished a month of this and see a big difference in my gelding.
    Date published: 2017-02-24
    Rated 5 out of 5 by from The Perfect Supplement! I bought this product about 2 months ago for the first time to help my horse with artheritis, and since I have been using this product, I have seen great improvement in my mare's movement as well as her looking more comfortable! I recommend this product for anyone looking for a great joint supplement! :)
    Date published: 2017-02-16
    Rated 5 out of 5 by from Works well I switched from smart tlc to this for my gelding. After a couple adjustments he is riding better. Don't know if it is the adjustments alone or if this is truely helping him. It is worth it to me to keep him on it.
    Date published: 2017-02-09
    Rated 5 out of 5 by from Great results over time I starated am 18 year old on this and after about 3 weeks, starated to see a big difference. Feet are easier to pick up and she is less stiff in the mornings. Will be continuing!
    Date published: 2017-02-06
    Rated 5 out of 5 by from For my Old Guy Was giving him a joint supplement, but when I went to buy more sometimes if they were out I would have to make due. This is always consistent!
    Date published: 2017-01-25
    Rated 5 out of 5 by from Love this product My semi retired 24 yr old Barrel horse does great on the senior flex and gives me no problems eating it. I'm very pleased that he seems to be able to keep moving freely without pain or discomfort.
    Date published: 2017-01-24
    Rated 4 out of 5 by from So far I think the senior pellets are helping my horse
    Date published: 2017-01-20
    Rated 5 out of 5 by from Great results! I had been meaning to start Booker, my 21yr old Morgan, on this product for a while, but since he seemed fine, I kept putting it off. This year I decided it was his Christmas present from me. I had used it w/ my daughter's 30yr old TB cross until his death at 35 to help his Arthritis. While it made Avalon more comfortable, he wasn't sound. I didn't think Booker had any joint issues; I just wanted to be proactive before he developed any. After being on this product for 3wks I can see I was wrong! He moves a lot more freely & I can feel a new vitality in his stride. He collects more easily now & is very forward-almost like he is another horse! We both got a Christmas present :)
    Date published: 2017-01-17
    Rated 5 out of 5 by from Fantastic product! I have been using this product for 6 weeks in conjunction with pituitary support for my 32 yr old Arab gelding. I noticed he is moving more freely when he is turned out and the "clicking" I was hearing in his knee and hock joints is very diminished. I expect it to get even better the longer he stays on it.
    Date published: 2017-01-14
    Rated 5 out of 5 by from Re:Happy Horse I started feeding my 23-year-old Quarter Horse mare Smart Flex Senior 2 months ago. She is frisky, playing in bucking like she's a youngster again
    Date published: 2017-01-12
    Rated 5 out of 5 by from
    Date published: 2017-01-11
    Rated 5 out of 5 by from Lucy is Loosey! My mare was starting to break down with bad stifles & hocks from her work load. She has been on this for 6 weeks and she is moving out GREAT! I am very happy with this supplement.
    Date published: 2017-01-11
    Rated 4 out of 5 by from Seems to be helping I have only used this product a little over a month now and it seems to be helping
    Date published: 2017-01-10
    Rated 5 out of 5 by from Great for my aging paint gelding He seems more flexible and is prancing again. His wind puffs are almost gone.
    Date published: 2017-01-09
    Rated 5 out of 5 by from my horses love this! they want it for treats too my horses are all seniors. this stuff must be wonderful for them because they beg me for more even though they get a scoop every day.
    Date published: 2017-01-09
    Rated 5 out of 5 by from Smaet Flex Senior Pellets Smart Flex Senior Pellets keep my 16 yr old Paint Pony feeling great!Nothing but the best for our KING!
    Date published: 2017-01-02
    Rated 5 out of 5 by from I bought this a month ago for my 27 year old mare who was starting to have trouble walking due to stiff joints because of the colder weather. Within a week she was walking so much better and by the 2nd week she was even trotting in the field. She has the sparkle back in her eyes. I highly recommend this product.
    Date published: 2017-01-02
    Rated 4 out of 5 by from Excellent I bought this supplement 2 months ago and have already seen results. I got it for my 9 year old gelding who has stiff hocks( use to be a Reiner) especially in the winter and they would click when he moved. After one month of using this supplement his joints no longer click and his suspension with movement has increased dramatically.
    Date published: 2016-12-30
    Rated 5 out of 5 by from Works well! Have been using in my senior gelding who has arthritis in flexor area & he has responded well. Highly recommend.
    Date published: 2016-12-27
    Rated 5 out of 5 by from I just started my 20 year old mare on this about a month ago because she had twice sprained a fetlock and I wanted something to help all of her joints. She seems to like it and hasn't had anymore sprains, although it's a bit too soon to say that this supplement is the cause. Hopefully, it will keep her sound for a long time since she's my main riding buddy and I do enjoy her a lot!
    Date published: 2016-12-21
    Rated 5 out of 5 by from Great as far as I can tell! My horse seems to enjoy this supplement. Never a pellet left behind!
    Date published: 2016-12-20
    Rated 5 out of 5 by from Could not be happier! Since purchasing Senior Pellets, within four weeks my 28 yr old Quarter Horse marestarted have more energy and is walking around the pasture all day instead of laying down and sleeping for hours on end. I can't say enough good about this product,
    Date published: 2016-12-13
    Rated 5 out of 5 by from Great for my aging horse Since he started taking this he is showing his old self with more energy
    Date published: 2016-12-09
    Rated 5 out of 5 by from Very palatable and so convenient. My horse has been on a custom dose of this for the past 2 months. He seems to be moving better and I will keep him on this supplement.
    Date published: 2016-12-07
    Rated 5 out of 5 by from A life changer for my horse First I have to If you have ever met Vegas or seen him jump you see a great athlete with a lot of screws loose. He has always been one of my harder rides. He was diagnosed with kissing spine several years back which led to chiro, message, new tack etc. But I have never been able to get him to go more than one or two rides without one of his favorite temper tantrums. A month ago I started him on SmartPaks Smartflex Senior and Smart Pak Muscle Mass. He has been just in lunging work and yesterday was his first real ride since I started him on it. He is a new horse, and I'm not exaggerating. He is calm, never offered to hollow, and he actually floats with his movement. If he isn't a testament to what a high quality supplement can do. My husband and I have always been rather sceptical about supplements. But the results in his muscles, joints and mind cannot be denied; it's night and day. I had to share, when a product knocks my socks off and solves something vets have been struggling with for years. He can have this supplement for the rest of his life and maybe even go back to his favorite show ring.
    Date published: 2016-12-04
    • y_2017, m_3, d_28, h_22
    • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0
    • cp_2, bvpage2n
    • co_hasreviews, tv_183, tr_1190
    • loc_en_US, sid_7472, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_smartpak

    Q & A

    Healthy Horses  ❤  Happy Riders