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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
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Product Overview

Helps bring your horse’s diet into balance

EO-3™is a DHA and EPA omega-3 fatty acid supplement that balances the modern horse’s omega-3 intake, Kentucky Equine Research developed EO-3™ from a sustainable source of menhaden fish oil in order to provide a direct source of bioavailable DHA and EPA in a palatable minty-apple flavor. EO-3 undergoes advanced distillation and includes a research-proven flavor to create a highly palatable product suitable for all horses. Marine-derived long-chain fatty acids DHA and EPA are more efficiently used as precursors of local hormones than plant-based sources of omega-3 fatty acids. Note: pump is not included with the gallon size. Please purchase separately.

  • Provides 9,450 mg of omega 3 fatty acids and 6,750 mg of DHA and EPA. Minty apple flavored!
  • Supports overall health and wellness, a normal response to inflammation, and more

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  • EO-3™ omega 3 supplement from Kentucky Equine Research
    In this video from KER, discover the benefits of this omega-3 supplement and if it's right for your horse.


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.

EO-3™ is rated 3.6 out of 5 by 25.
Rated 5 out of 5 by from Great Product! My suspicious TB mare was turned off by the cherry smell at first but after a couple days of trying to pick around it she finally ate it up and figured out she actually liked it. I think the cherry smell is what turns most horses off at first (better then fishy smell in my opinion!) but once they finally try it they find that they like the taste. I stared off only putting a little in then working my way up to the full 1oz each feeding. I noticed a difference in her coat pretty quickly. She always had a nice looking coat but after starting EO-3 it became exceptional, especially when she grew in her winter hair.
Date published: 2020-01-18
Rated 3 out of 5 by from Wish my horse liked it I mixed this with my horses salt & magnesium supplements, then mixed it with some of his pelleted feed. He left a portion of it untouched. When I use flax oil or coconut oil he eats it all. I really like that DHA & EPA are available for absorption w/o conversion. Sad he didnt like it.
Date published: 2020-01-15
Rated 4 out of 5 by from Really works but Smells Bad. This is a great product and my ponies that are itchy are much better on EO-3. I suppose no matter how much bubblegum flavor you put in fish oil it won't smell better. So, if you don't mind an initial blast of bubblegum (think bazooka) with an after smell of dead fish so your pony's coat is less itchy and his general health is boosted then you should buy this product. Be prepared to use a syringe for a while until they get used to it. I have two ponies that will now chase you down for their slug of EO-3 and one that is "whatever". Just don't expect them to eat it at first. Expensive which is why only 4 stars.
Date published: 2019-09-22
Rated 3 out of 5 by from Don't know if it works, my horses won't eat Upon a recommendation from an Equine Nutritionist I decided to give this a try. None of my horses will touch their food with it. SmartPak recommended trying sugar free applesauce or sweetening with Stevia.
Date published: 2019-07-03
Rated 5 out of 5 by from Awesome Product! I bought this expecting my *extremely* picky eater wouldn't touch it. (I'm talking he won't touch his food if something he doesn't like is in it) He actually eats it really well!! The smell is REALLY strong like bubble gum (which is a turn off to me but oh well). This is by far the BEST ratio of omega 3 to 6 you can buy on the market. I was using Equine Omega Complete, however, I will be switching to this product from now on. It is WELL worth the money.
Date published: 2019-05-02
Rated 1 out of 5 by from no go. My horse would have no part of this. I tried pouring molasses on his grain and he still wouldn't touch it.
Date published: 2019-04-13
Rated 3 out of 5 by from It's a good product, but my horse will NOT touch it in any food so I have to syringe it down her throat. I am hoping eventually she will eat it in her food now that she has gotten used to the taste, but so far that has not happened.
Date published: 2019-03-10
Rated 5 out of 5 by from Bubblegum smell, but it works! I was looking for something to reduce inflammation and help my navicular horse be more comfortable. I first bought an equine fish oil advertised all over Facebook, however, the ratio of Omega 3's to Omega 6's in that oil is not what I thought my mare needed. In my research I found KER EO-3 oil and the ratio of the Omegas is perfect! I bought it thru Smart Pak and added it to mushies (Timothy pellets watered down). She would not eat it. I even tried to hand feed it to her. She tried to eat it, but spit it out. I left it in her bucket (which is attached to the stall door) and in the morning it was all gone. She has eaten it ever since with no problems. She even nickers for it. In the month or so she has been EO-3 oil I have noticed her coat become much more soft and shiny and her soreness in her navicular foot is definitely less. With the added benefits of the Omega 3 to other parts of her body she is looking overall more healthy. I would definitely recommend giving this product a try.
Date published: 2019-02-03
Rated 1 out of 5 by from Overpowering (terrible) bubblegum smell I was surprised how strong this smelled when I opened the container. The oil doesn't have much flavor but the smell is really overpowering and smells kind of like super artificial (don't know how to describe it) awful bubblegum. My horse wouldn't touch even a tiny amount in his feed and then wouldn't eat out of that feed tub! I washed it with soap and water but it took a day for the smell to dissipate and him to be willing to eat out of the tub again. Thankfully SmartPak gave me a merchandise credit for the product. A friend's horse who eats anything is on this supplement but my horse gave it a major "hoof down".
Date published: 2019-01-20
Rated 1 out of 5 by from Not Palatable Was really excited to try this supplement. My horse has a chronic cough and omegas are great for that as well as many other things. Unfortunately he took a big bite and spit it back out. Very strong bubblegum smell and my horse hated the taste. Thanks to SmartPak for giving me a full refund!
Date published: 2018-11-28
Rated 5 out of 5 by from His hair looks terrific! Have to give by oral injection and it does smell like fish bubblegum ;) Skin has cleared up and super shiny hair!
Date published: 2018-10-29
Rated 1 out of 5 by from My horse wouldn’t eat no matter what I put it on. Glad I was able to return it even if I had to pay the shipping.
Date published: 2018-09-19
Rated 5 out of 5 by from Seeing Results We havebeen using the EO3 for a couple of months now. And we're seeing the results on my horses coat and he seems to be doing much better with his coughing. He is also on an antihistamine. Not sure what is helping the coughing....but he looks GREAT. And he loves the taste of it.
Date published: 2018-09-12
Rated 3 out of 5 by from Good supplement but faulty lid I bought this about a month ago for my horse showing neuro symptoms since this addition helps reduce inflammation everywhere. After researching the benefits and loving this company as I feed my horses elevate and joint armor as well... I started both horses on this too. I bought the large gallon size. After 2 weeks the lid wouldn't screw tight anymore. Of course somehow it got knocked over and I lost it all. Pretty upsetting given it was a hundred dollars. That should not happen.
Date published: 2018-05-08
Rated 5 out of 5 by from Stinks but Effective I've been using this with my dressage mare for over a year now, and three things have been positively affected: 1. her coat is shinier with more dapples and less hair breakage. 2. her skin is not nearly as dry and irritated, and her skin allergies (small itchy bumps to different products) have subsided substantially, as well as her reactions to bug bites. 3. her legs do not stock up anymore, nor is there any mild inflammation in her hocks like she had before. So, yeah, it smells like fishy bubblegum, and some horses probably won't take to it, but she IS a picky eater and will eat it all, albeit slowly. I highly recommend this oil, in spite of the smell.
Date published: 2018-04-10
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