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SmartFlex® Senior Pellets

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Feeding Chart

Daily Serving

Feeding Chart
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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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 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

Supercharge Your Supplements

  • 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.
  • 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.

SmartFlex® Senior Pellets is rated 4.7 out of 5 by 1601.
Rated 4 out of 5 by from Satisfied customer I revised Rocky's supplement to Smart Senior Joint & Hoof (from Ultra Smart Hoof). He is a very picky eater, and after several days he is eating everything. I'm hoping it will continue to maintain his hooves, as well as help to decrease his stiffness. I'll keep you informed--that's the only reason it's not a 5 star rating!
Date published: 2024-05-02
Rated 5 out of 5 by from SmartPak Senior Flex pellets are ingested My horse quit eating the powdered joint supplement that we gave him for a long time. The SmartFlex Senior Pellets have taken the powder’s place and he eats them in his grain with no problem. It is too early to tell if they will help with his gimpiness, but we should notice in a couple of weeks and pellets are the perfect solution fo his willingness to intake the supplement.
Date published: 2024-02-07
Rated 5 out of 5 by from Works great!! I bought this a month ago for my 22 year old mare. She had been struggling with soreness on and off most of the year. After a couple weeks on this, she's back to herself. I'm super happy have my girl back!
Date published: 2024-01-11
Rated 5 out of 5 by from Great product! Makes feed time so easy! The Smartpaks are so convenient and I love that this formula comes in pellets as my mare won’t eat a powder form.
Date published: 2023-12-08
Rated 5 out of 5 by from Big difference for my DSLD mare. I have an older mare with DSLD/ESPA and she’s been on this supplement for about a year. I didn’t think it was helping and weaned her off it which turned out to be a big mistake. She quickly declined and was noticeably stiff, sore, not moving around much, and laying down a lot. I got her right back on it. At this point in her life and disease stage, I’m trying to keep her as comfortable as possible. This supplement is a huge part of that.
Date published: 2023-10-02
Rated 4 out of 5 by from Moving with ease This has made a difference in Tango. He was very stiff. He is moving better and a lot more flexable.
Date published: 2023-06-08
Rated 5 out of 5 by from Horse loves it It's too early to tell for sure if it is helping or not, but I have noticed that my senior gelding seems to have a lot of energy and just looks overall healthy and vibrant. It's been about 6 weeks since I started the supplement.
Date published: 2023-05-09
Rated 5 out of 5 by from Thank you SmartPak! I have a mare in her mid 20s who has been struggling lately. I started her on this supplement and am so happy with the results! She’s able to hold her feet up for the farrier so much better now. Before this supplement, she hadn’t been able to canter in the round pen in several years - she comfortably canters now! Thank you, SmartPak, for making my old girl feel better and giving me more time with her.
Date published: 2023-02-02
Rated 5 out of 5 by from Seeing the results of changes My 14 y o TWH has some Arthritis in his hock and some stiffness up front. After a month on Smart flex he’s running around with his tail in the air no limp or stiffness full smooth gait.
Date published: 2022-12-12
Rated 5 out of 5 by from Noticeable difference I've been using this product for just under 3 months on on a thoroughbred with bone chips and arthritis in her front ankles, This has kept her comfortable and able to do light work.
Date published: 2022-11-01
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