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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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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

  • 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 3.8 out of 5 by 32.
Rated 5 out of 5 by from Reduced Airway Inflammation I bought this based on a completed study for airway inflammation in horses and that omega 3s could significantly reduce that inflammation. Before using this, my horse would be wheezing/heavily breathing within minutes of starting a ride. Within 3 days there was a drastic improvement with her breathing. Absolutely amazing. She is also an incredibly picky eater and will eat around any supplement and will eat this.
Date published: 2023-03-31
Rated 5 out of 5 by from Helping with my slow healers My vet noticed my horses were healing slower than normal after cuts or scrapes. They are on pasture with high quality grass hay and a general nutritional supplement. At the advice of a KER nutritionist, I added Nano-E and EO-3 to one horse that had an existing wound. Within 60 hours I am noticing a visual difference in healing speed. I will continue to monitor and report back.I am feeding using a large syringe in the mouth, so that none goes wasted. The gelding likes the taste, no dribbling or refusing to swallow.
Date published: 2022-11-22
Rated 5 out of 5 by from Love this oil I’ve always given my horses flax seed for extra omega 3s. They are on very little grass. I read an article on this stating the benefits of giving it to broodmares and started my horse on it. They look great and eat it with no problems.
Date published: 2022-08-05
Rated 3 out of 5 by from Really want my horse to eat it I have been slowly adding 1/8-1/4 oz to my horse's grain for two weeks. He's continually refused to eat any more than that. Supposedly, this is a minty-apple scent, but to my nose it does seem to smell more like cherry-bubblegum (to be fair, it definitely doesn't smell off-putting to me). I'm really hoping to be able to get him to eat more over time, because unfortunately I don't think 1/4 oz is going to have much of an effect on a 1600lb horse. Definitely beware if you have a known picky eater.
Date published: 2022-06-27
Rated 4 out of 5 by from Hard to pour How do you pour when the bottle is so big. Couldn’t find a pump that fit.
Date published: 2022-03-24
Rated 3 out of 5 by from Horse won’t eat it I’m sure this is a great product. Wish my horse would eat it. Even when I only put 1/2 oz. he won’t eat it.
Date published: 2022-03-21
Rated 5 out of 5 by from Great source of EPA/DHA I was feeding my pregnant mare welactin to support both her and her foals health (particularly foals brain health). Welactin was out of stock so started looking at other options and realized as long as I got the larger size of EO3, it was more cost effective anyway. Colt also gets it now. Both gobble it up.
Date published: 2022-01-01
Rated 5 out of 5 by from Great product She likes the taste, and it really helped with her sweet itch and hives, more than flax did.
Date published: 2021-11-10
Rated 2 out of 5 by from Great ingredients, horses won’t eat it Ingredient-wise, this is the best omega 3 supplement I’ve found for horses. Unfortunately, they hate the flavor and will not touch it.
Date published: 2021-08-03
Rated 5 out of 5 by from Great Results & Horses Love It I have had my horse on this for about 2 years now after recommendation from my vet. My horse can be very itchy from both bug bites and other allergens, developing hives and repeatedly cutting open her neck, dock, and hocks. The original cherry flavor took slow introducing. She seemed more offended by the strong smell than the taste but got used to it. The new minty apple flavor is an absolute hit! She licks her feed pan to get every last drop. No more hives or excessive rubs, cuts, and sores. She will have the occasional itch but nothing like before. It takes about a month to build up the results. I take her off this for a few months in winter and make sure to restart a month before bugs come out.
Date published: 2021-06-19
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