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SmartFlex® Ultra Pellets

1. Packaging/Size
2. Customization & Shipping Frequency
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28 day supply
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28 day supply
day supply
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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.
( Cups / Meal)

You're eligible to apply for our FREE ColiCare Program after checkout.

  • This horse already has an existing AutoShip SmartPak. Please select the "AutoShip" checkbox or enter a different horse name.
Please call 1-800-461-8898 to order this product.
New ship same day!
These are for:
Sign in to choose an existing
  • This horse already has an existing AutoShip SmartPak. Please select the "AutoShip" checkbox or enter a different horse name.

FINAL SALE - This item cannot be returned or exchanged.

FINAL SALE - This item cannot be returned or exchanged.

Order within and
have it by
Shipping to
Add these items to your cart to get your estimated arrival date.
Shipping to
The frequency you selected is not eligible for SmartPerks benefits that come with AutoShip supplement orders. In order to get benefits like free shipping and 10% off, set this product to ship at least every days. What are SmartPerks?


Which horses benefit from comprehensive joint and soft tissue support?

Your horse’s body has the ability to repair and rebuild after normal “wear and tear” from light activity, but the increasing demands of riding and training could cause more damage than it can keep up with. Joint supplements in this category are designed for horses in heavy work to help support your horse by providing a steady supply of the ingredients he needs to cope with the demands of his workload. This level of support is also worth considering for horses in lighter workloads that may benefit from additional support due to factors like age or previous joint issues.

Other ways to support success

100% Happiness Guarantee
At SmartPak, your happiness is at the core of everything we do. We put our products to the test in our barns and on our horses, and back every order with our world-class customer service so that you can shop with confidence. As part of our Happiness Guarantee, we promise you:
  • Expert advice from riders
  • Free shipping every day
  • Free return shipping on sized items
  • Hassle-free returns up to 365 days after purchase


(Maintenance Dose = )
Ingredient Amount
  • Ingredient Per Serving Per Pound

How the Ingredients Work



Instructions for Use:
Horse Weight Recommended Amount Loading Amount



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® Ultra Pellets is rated 4.6 out of 5 by 582.
Rated 3 out of 5 by from Easy to use Very easy to use and I love the auto shipment option, however this particular product just didn’t work for my horse.
Date published: 2019-10-17
Rated 3 out of 5 by from havent really seen any changes got both my horses on this- and for their weight. im a month in and dont really see any changes. gonna change to another one. i love rehab but will test positive
Date published: 2019-09-08
Rated 5 out of 5 by from Incredible results So I had my horse on Cosequin Optimized, and while it worked for a while, its just not enough for him. So after reading countless reviews about SmartFlex Ultra. I though it was worth a shot. Wow the results were noticeable after about week, Fagan is able to bounce back after a hard ride without being sore the next day. His strides are more fluid and he feels better overall.
Date published: 2019-08-02
Rated 4 out of 5 by from easy to feed complete joint supplement These pellets are very palatable, my horse eats them right up, no powder left at the bottom of the bucket and they have all the joint supplements research supports for good joint health!
Date published: 2019-07-23
Rated 5 out of 5 by from Took Her Off - Never Again! I had my 12 year old OTTB on this for years. Took her off because I thought I should now go with a “sexy name” supplement. Never again! She immediately started having problems, needing steroid injections in joints, etc. I’m going back to Smartflex Ultra right now! Not sure there’s a connection, but after $1500 in vet bills I’m going back to what worked so well for her.
Date published: 2019-06-13
Rated 5 out of 5 by from Incredible supplement!! Our gelding suffers from stiffness in the colder weather & the supplement we gave him just didn’t seem to be helping any longer. After lots of research & outstanding results from other Smart Supplements, we switched him to the SmartFlex Ultra. He’s been on it for a little more than 3 months now & the difference is noticeable. His rear end isn’t stiff, making him a much happier camper.
Date published: 2018-12-19
Rated 4 out of 5 by from I bought these for an elderly mare with some joint problems. Unfortunately they have not helped her, however I used the left overs from the 3rd month to a retired race horse that just needed a little help and they done fabulous!!
Date published: 2018-12-07
Rated 1 out of 5 by from Charged two prices for the same supplement I had one horse on the Resilliance 3 and was "grand-fathered in" at $65.87 and another horse on SmartFlex which is EXACTLY the same product as the old Resilience 3 at a price of $57.96. When I called Smartpak, the representative there went through the ingredients with me and varied the two suppliments had the same ingredients. Smartpak did not have the decency to contact me and say I was paying two different prices for the same supplement. Rather, they led me to believe I was paying a lower price because I was "grandfathered in". I feel this is bad customer service especially when my barn purchases over $1000 in supplements from smartpak each month. I am writing this review to make sure you are not being overcharged for this product whether you have one horse or many. SmartFlex is the old Resilliance 3 but is cheaper! I would appreciate Smartpak crediting the over-charge that I have been paying for over a year to me and any other customers that have been "grandfathered in". I do like the product and would like to give it a good review, I just feel like Smartpak needs to be honest with its customers about the products they are selling and make this right.
Date published: 2018-11-02
Rated 5 out of 5 by from Quick Results - More Benefits than Expected I bought this about 3 weeks ago and put my 20 year old warmblood mare and my 15 year old BLM mustang gelding on it. Neither had any known injuries they were actively healing from but my mare was definitely getting creaky and I noticed she seemed to be protecting a knee and a hip a bit more and I just thought that extra support for her tendons would be a good idea in case the pain wasn't just joint related. My mustang is a muscle powerhouse but he's been having trouble getting into the Piaffe lately and I again just thought a really robust supplement might help him to be a little looser and freer. I saw results in the Mustang within a week - more fluid movement, quicker warm ups and it just seems like its easier for him to "put himself together" in his joints and that everything is more comfortable for him. I noticed it in the mare in her skin and coat first, within 2 weeks she was a little shiner and less dry (she does recieve an omega supplement every day already, as well, but i think the extra vitamin c and other support in this supplement kicked her up a notch nutritionally) and on week 3 I am noticing that she is starting to move a little freer in her hind end and I'm not noticing the shaking in her knee like I was a few weeks ago. I'm excited to see what a couple more months of this supplement will do for her since I think she probably needs more "umph" than he does. I'll likely "drop them down" to just the senior SmartPak supplement after a couple of bags of this, but I'll tell you, I'm very pleased with the results and consider it money well spent.
Date published: 2018-10-31
Rated 5 out of 5 by from
Date published: 2018-10-26
Rated 5 out of 5 by from Seems to work! I can tell a difference in my 14 y/o OTTB that has a body of a 20 + from having over 50 starts, to competing in eventing and now as a lesson horse, this boy needs the joint support. He arrived on my farm September of 2017 cracking and creaking every step he took. After a vet examination, they recommended being put on a joint supplement, so after a lot of research I tried Smart Flex Ultra and I have to admit, it took several months for me to tell a difference but I DID tell a difference this summer (2018). No more creaking and cracking!
Date published: 2018-10-18
Rated 5 out of 5 by from The Best Supplement for our Polo Horses! We have been using this supplement for years for our polo horses with great results. We take extreme care for fitness and health of our string, and this is the best option for us to ensure we maintain healthy joints and tendons.
Date published: 2018-06-14
Rated 5 out of 5 by from Finally lost the limp :) She’s been on it 3-4 weeks, she also had 30 days of stall rest. She’s doing better, i think it’s from the combination.
Date published: 2018-04-02
Rated 5 out of 5 by from Great results My QH would stock up after every ride. The vet said that some horses just do this and as long as she wasn’t lame or showing pain, not to worry about it. But I did. I started her on Smartflex Ultra and voila’. No more fat ankles. I’m so very pleased with the results. She is also loving the taste and she is the ultimate picky eater.
Date published: 2018-03-20
Rated 5 out of 5 by from Love this! My mare has been on this for about a month and she is moving and looking so much better.
Date published: 2018-03-01
Rated 3 out of 5 by from Product review This product did not seem to make a difference in my horse. It did less than some other alternative products that are less exspensive. May not have been right for my hose but it may work for yours!
Date published: 2018-02-05
Rated 5 out of 5 by from Great for Arthritic Horses! My 10-year-old reining gelding has arthritis in his stifles and hocks. I can't afford joint injections or intramuscular injections such as Adequan or Legend, so I decided to give this joint supplement a try. I was very skeptical, but less than two months later I have noticed a significant difference! He used to be very fidgety for the shoer when getting sliders on because he was sore, but this time around he stood as stock still as when he was younger. My shoer noticed and complimented him. I feel like he is riding a lot better as well. I don't think a joint supplement can ever quite compare to injections (I've seen night-and-day results with them in other people's horses), but I think for those who can't afford the expensive therapy, this is an excellent substitute!
Date published: 2018-01-31
Rated 5 out of 5 by from Put my 15 year old with arthritis on this and he's shown remarkable improvement! Thank you SmartPark!!!
Date published: 2018-01-23
Rated 4 out of 5 by from SmartFlex Ultra Pellets So far, so good. My gelding has only been on 30 days.
Date published: 2018-01-19
Rated 5 out of 5 by from Great Supplement! I put my new horse on this supplement a few months ago when I first purchased him. I knew that he would be jumping several times a week, so I wanted to put him on a supplement that would keep his joints strong and healthy. Almost immediately he began jumping and moving better! He has been on this product for about 4 months now, and it has definitely helped to keep him strong, healthy, and happy!
Date published: 2018-01-14
Rated 5 out of 5 by from Love! I bought these a month ago for my daughters ottb who has had some joint problems lately and just within a month we’ve seen a huge difference in how he is acting. He has loosened up when under saddle and on the ground, overall I’m very happy to be buying this product!
Date published: 2017-12-26
Rated 5 out of 5 by from It works! My horse has been on this supplement for only a short while, but I can already see and feel the difference in her movements. Her gaits are fluid and smooth and what a joy she is to ride. Many thanks for your great product
Date published: 2017-12-21
Rated 5 out of 5 by from Same ingredients as cosequin then some! I’ve been using it a month now. I compared the ingredients to cosequin asu plus. Smart Flex Ultra has twice as much MSM (@ 10000mg) and 3000mg more glucosamine (@ 10000mg). And it has twice as as much HA (@ 100mg). And not to mention it’s $25 cheaper than cosequin asu plus per month!!!! And my horse will eat this by itself without any grain!
Date published: 2017-12-11
Rated 5 out of 5 by from Happy horse My horse has a sore shoulder, even standing on three legs for the farrier was hard on him. I’ve been giving him Smart Flex Ultra for about a couple months and I can see he is feeling/moving much better. I love having a happy horse.
Date published: 2017-11-30
Rated 4 out of 5 by from Horses love the taste Love this supplement. One of the only ones I use that I actually see a difference in my horses.
Date published: 2017-11-29
Rated 1 out of 5 by from No Improvement I bought this for a young horse and saw no improvement at all.
Date published: 2017-11-06
Rated 5 out of 5 by from So Far So Good! Haven't been on this supplement long, just a month, but horse feels good. I have been on the tendon supplement for years, and thought I'd bump up to this. He eats this fine, and I'm hoping to see good results from now on. He is "loose" and forward, which is great for a horse who is usually lazy!
Date published: 2017-11-01
Rated 1 out of 5 by from Horses will not eat this Does it work? I have no idea. My horses will not touch this stuff. Mix it in with their grain and they will walk away from their feed buckets.
Date published: 2017-10-31
Rated 1 out of 5 by from Joint supplements Was not effective for joint pain. Not worth the money
Date published: 2017-10-30
Rated 4 out of 5 by from Joint supplement is working! Our Appy is 16 and shows all around. He started taking supplements two months ago and seems so full of energy like his joints don't hurt anymore. A little expensive but it's working!
Date published: 2017-10-19
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