Best Horse Calming Supplements 2026: According to Reviews | Chewy

Best Calming Supplements For Horses

Horses can experience stress during travel, training, competitions, changes in routine, or other unfamiliar situations. Calming supplements are often used as part of a broader management approach to help support focus and relaxation in certain horses. Because every horse responds differently, it is important to work with your veterinarian before adding supplements to your horse's routine, especially for ongoing behavioral or health concerns.

Our Top Picks

How we created this horse calming supplement list

We leveraged input from our veterinarians and artificial intelligence to identify key considerations to help you find the best horse calming supplement.
We scanned thousands of customer reviews and ratings and scored each product based on its performance against each of the key considerations. We then considered how popular a product is with Chewy customers and combined that with its key consideration scores to create the list of the best horse calming supplements.

Key horse calming supplement considerations

Dosage and Administration

Effectiveness

Ingredients

Long-Term Effects

1
Kentucky Performance Products Elevate Maintenance Powder Vitamin E Horse Supplement, 2-lb jar
Kentucky Performance Products Elevate Maintenance Powder Vitamin E Horse Supplement, 2-lb jar
Kentucky Performance Products Elevate Maintenance Powder Vitamin E Horse Supplement, 2-lb jar
Kentucky Performance Products Elevate Maintenance Powder Vitamin E Horse Supplement, 2-lb jar

Kentucky Performance Products Elevate Maintenance Powder Vitamin E Horse Supplement, 2-lb jar

Rated 4.8 out of 5 stars
568
$51.79 Chewy Price
($0.40/serving)
Promo, New Customers Only: Spend $49+, get $25 eGift Card

Our ratings

Dosage and Administration

4.6/5
Excellent

Effectiveness

4.7/5
Excellent

Ingredients

4.7/5
Excellent

Long-Term Effects

4.5/5
Great

Is this horse calming supplement right for my pet?

Lifestage

All Lifestages, Adult

Top Ingredients

D-Alpha-Tocopheryl Acetate (Natural Vitamin E), And Dextrose

Special Diet

Vitamin Fortified

Farm Animal Type

Horse
2
Kentucky Equine Research Nano-E Antioxidant Liquid Horse Supplement, 15-fl oz bottle
Kentucky Equine Research Nano-E Antioxidant Liquid Horse Supplement, 15-fl oz bottle
Kentucky Equine Research Nano-E Antioxidant Liquid Horse Supplement, 15-fl oz bottle

Kentucky Equine Research Nano-E Antioxidant Liquid Horse Supplement, 15-fl oz bottle

Rated 4.7 out of 5 stars
207
$90.20 Chewy Price
($0.85/serving)
Promo, New Customers Only: Spend $49+, get $25 eGift Card

Our ratings

Dosage and Administration

4.6/5
Excellent

Effectiveness

4.6/5
Excellent

Ingredients

4.7/5
Excellent

Long-Term Effects

4.6/5
Excellent

Is this horse calming supplement right for my pet?

Lifestage

All Lifestages, Adult

Top Ingredients

Water, Vitamin E (D-Alpha Tocopherol), Lecithin, Polysorbate 80, Citric Acid

Food Flavor

Unflavored

Farm Animal Type

Horse
3
Formula 707 Calming Apple Flavor Pellets Horse Supplement, 5-lb bag
Formula 707 Calming Apple Flavor Pellets Horse Supplement, 5-lb bag
Formula 707 Calming Apple Flavor Pellets Horse Supplement, 5-lb bag
Formula 707 Calming Apple Flavor Pellets Horse Supplement, 5-lb bag
Formula 707 Calming Apple Flavor Pellets Horse Supplement, 5-lb bag
Formula 707 Calming Apple Flavor Pellets Horse Supplement, 5-lb bag

Formula 707 Calming Apple Flavor Pellets Horse Supplement, 5-lb bag

Rated 4.5 out of 5 stars
392
$46.46 Chewy Price
($1.17/serving)
Promo, New Customers Only: Spend $49+, get $25 eGift Card

Our ratings

Dosage and Administration

4.5/5
Great

Effectiveness

4.5/5
Great

Ingredients

4.4/5
Great

Long-Term Effects

4.4/5
Great

Is this horse calming supplement right for my pet?

Lifestage

All Lifestages, Adult

Top Ingredients

Active Ingredients: Magnesium, Thiamine, L-Tryptophan., Inactive Ingredients: Rice Bran, Wheat Midds

Special Diet

Hydrolyzed Protein

Food Flavor

Apple, Fruits & Vegetables
4
Foxden Equine Quiessence Pellet Horse Supplement, 5-lb bag
Foxden Equine Quiessence Pellet Horse Supplement, 5-lb bag
Foxden Equine Quiessence Pellet Horse Supplement, 5-lb bag

Foxden Equine Quiessence Pellet Horse Supplement, 5-lb bag

Rated 4.7 out of 5 stars
105
$29.95 Chewy Price
($5.99/lb)
Promo, New Customers Only: Spend $49+, get $25 eGift Card

Our ratings

Dosage and Administration

4.7/5
Excellent

Effectiveness

4.7/5
Excellent

Ingredients

4.6/5
Excellent

Long-Term Effects

4.6/5
Excellent

Is this horse calming supplement right for my pet?

Top Ingredients

Active Ingredients: Magnesium Oxide, Magnesium Proteinate, Chromium Propionate. Inactive Ingredients: Artificial Banana Flavoring, Distillers Grains, Ligno Sulfonate

Special Diet

Low NSC

Food Flavor

Banana

Farm Animal Type

Horse
5
Mad Barn Magnesium Oxide Muscle Relaxation & Nerves Horse Powder Supplement, 11-lb bucket
Mad Barn Magnesium Oxide Muscle Relaxation & Nerves Horse Powder Supplement, 11-lb bucket
Mad Barn Magnesium Oxide Muscle Relaxation & Nerves Horse Powder Supplement, 11-lb bucket

Mad Barn Magnesium Oxide Muscle Relaxation & Nerves Horse Powder Supplement, 11-lb bucket

Rated 4.8 out of 5 stars
81
$36.99 Chewy Price
($0.22/serving)
Promo, New Customers Only: Spend $49+, get $25 eGift Card

Our ratings

Dosage and Administration

4.6/5
Excellent

Effectiveness

4.6/5
Excellent

Ingredients

4.7/5
Excellent

Long-Term Effects

4.6/5
Excellent

Is this horse calming supplement right for my pet?

Top Ingredient

Magnesium

Special Diet

Low NSC

Farm Animal Type

Horse

Food Form

Powder
6
Kentucky Performance Products Elevate Se Vitamin E & Selenium Powder Horse Supplement, 2-lb jar
Kentucky Performance Products Elevate Se Vitamin E & Selenium Powder Horse Supplement, 2-lb jar
Kentucky Performance Products Elevate Se Vitamin E & Selenium Powder Horse Supplement, 2-lb jar
Kentucky Performance Products Elevate Se Vitamin E & Selenium Powder Horse Supplement, 2-lb jar

Kentucky Performance Products Elevate Se Vitamin E & Selenium Powder Horse Supplement, 2-lb jar

Rated 4.9 out of 5 stars
155
$65.19 Chewy Price
($0.51/serving)
Promo, New Customers Only: Spend $49+, get $25 eGift Card

Our ratings

Dosage and Administration

4.5/5
Great

Effectiveness

4.6/5
Excellent

Ingredients

4.5/5
Great

Long-Term Effects

4.4/5
Great

Is this horse calming supplement right for my pet?

Lifestage

All Lifestages, Adult

Top Ingredients

Vitamin E, Selenium

Special Diet

Mineral Fortified, Vitamin Fortified

Farm Animal Type

Horse
7
Farnam Quietex Focusing & Calming Hay Flavor Pellets Horse Supplement, 1.62-lb tub
Farnam Quietex Focusing & Calming Hay Flavor Pellets Horse Supplement, 1.62-lb tub
Farnam Quietex Focusing & Calming Hay Flavor Pellets Horse Supplement, 1.62-lb tub
Farnam Quietex Focusing & Calming Hay Flavor Pellets Horse Supplement, 1.62-lb tub
Farnam Quietex Focusing & Calming Hay Flavor Pellets Horse Supplement, 1.62-lb tub
Farnam Quietex Focusing & Calming Hay Flavor Pellets Horse Supplement, 1.62-lb tub
Farnam Quietex Focusing & Calming Hay Flavor Pellets Horse Supplement, 1.62-lb tub
Farnam Quietex Focusing & Calming Hay Flavor Pellets Horse Supplement, 1.62-lb tub
Farnam Quietex Focusing & Calming Hay Flavor Pellets Horse Supplement, 1.62-lb tub

Farnam Quietex Focusing & Calming Hay Flavor Pellets Horse Supplement, 1.62-lb tub

Rated 4.5 out of 5 stars
77
$33.99 Chewy Price
($1.31/serving)
Promo, New Customers Only: Spend $49+, get $25 eGift Card

Our ratings

Dosage and Administration

4.6/5
Excellent

Effectiveness

4.5/5
Great

Ingredients

4.0/5
Great

Long-Term Effects

4.6/5
Excellent

Is this horse calming supplement right for my pet?

Lifestage

All Lifestages, Adult

Top Ingredients

Corn Starch, Glucose, Glycerin, Malt Syrup, Maltodextrins

Food Flavor

Hay

Farm Animal Type

Horse
8
SmartPak SmartSupplements SmartCalm Ultra Pellets Supplement for Horses, 7.5-lb bag
SmartPak SmartSupplements SmartCalm Ultra Pellets Supplement for Horses, 7.5-lb bag
SmartPak SmartSupplements SmartCalm Ultra Pellets Supplement for Horses, 7.5-lb bag
SmartPak SmartSupplements SmartCalm Ultra Pellets Supplement for Horses, 7.5-lb bag
SmartPak SmartSupplements SmartCalm Ultra Pellets Supplement for Horses, 7.5-lb bag
SmartPak SmartSupplements SmartCalm Ultra Pellets Supplement for Horses, 7.5-lb bag

SmartPak SmartSupplements SmartCalm Ultra Pellets Supplement for Horses, 7.5-lb bag

Rated 4.7 out of 5 stars
79
$77.81 Chewy Price
($1.37/serving)
Promo, New Customers Only: Spend $49+, get $25 eGift Card

Our ratings

Dosage and Administration

4.4/5
Great

Effectiveness

4.6/5
Excellent

Ingredients

4.5/5
Great

Long-Term Effects

4.5/5
Great

Is this horse calming supplement right for my pet?

Top Ingredients

Alfalfa Meal, Artificial Flavor, Beet Pulp, Corn Distillers Dried Grains with Solubles, Grape Pomace (Ground Grape Seed and Skin)

Special Diet

Sugar Free, Grain-Free

Farm Animal Type

Horse

Food Form

Supplement
9
UltraCruz Selenium Nerve, Muscle & Joint Support Pellets Horse Supplement, 10-lb bag
UltraCruz Selenium Nerve, Muscle & Joint Support Pellets Horse Supplement, 10-lb bag
UltraCruz Selenium Nerve, Muscle & Joint Support Pellets Horse Supplement, 10-lb bag
UltraCruz Selenium Nerve, Muscle & Joint Support Pellets Horse Supplement, 10-lb bag

UltraCruz Selenium Nerve, Muscle & Joint Support Pellets Horse Supplement, 10-lb bag

Rated 4.8 out of 5 stars
62
$28.99 Chewy Price
($0.18/serving)
Promo, New Customers Only: Spend $49+, get $25 eGift Card

Our ratings

Dosage and Administration

4.8/5
Excellent

Effectiveness

4.6/5
Excellent

Ingredients

4.8/5
Excellent

Long-Term Effects

4.7/5
Excellent

Is this horse calming supplement right for my pet?

Lifestage

All Lifestages, Adult

Top Ingredients

Dehydrated Alfalfa Meal, Ground Flax Seed, Rice Bran, Soybean oil, Selenium

Food Flavor

Grain

Farm Animal Type

Horse
10
SynNutra Equine SynChill Daily Calming Pellets Horse Supplement, 30 Servings
SynNutra Equine SynChill Daily Calming Pellets Horse Supplement, 30 Servings
SynNutra Equine SynChill Daily Calming Pellets Horse Supplement, 30 Servings
SynNutra Equine SynChill Daily Calming Pellets Horse Supplement, 30 Servings
SynNutra Equine SynChill Daily Calming Pellets Horse Supplement, 30 Servings

SynNutra Equine SynChill Daily Calming Pellets Horse Supplement, 30 Servings

Rated 4.4 out of 5 stars
38
$89.50 Chewy Price
($2.99/ea)
Promo, New Customers Only: Spend $49+, get $25 eGift Card

Our ratings

Dosage and Administration

4.5/5
Great

Effectiveness

4.5/5
Great

Ingredients

4.4/5
Great

Long-Term Effects

4.4/5
Great

Is this horse calming supplement right for my pet?

Top Ingredients

Alfalfa Meal, Molasses, Equience

Special Diet

Gluten Free, Plant Based, Human-Grade, Natural...

Food Flavor

Hay, Molasses

Farm Animal Type

Horse

Frequently Asked Questions about Horse Calming Supplements

What types of ingredients do horse calming supplements use, and how do they differ?

Calming supplements generally take a few ingredient approaches. Mineral and B-vitamin blends—for example, magnesium and thiamine—aim to support normal nerve and muscle function. Amino-acid formulas often use L-tryptophan for focus and a relaxed attitude. Others emphasize antioxidant or selenium support for nerves and muscles, so the best fit depends on your horse's needs and your veterinarian's guidance.

Is a powder, pellet, or liquid better for a picky eater or for travel?

Pellets often come in tasty flavors like apple, hay, or banana, which can help picky horses finish their serving when mixed with feed. Powders blend easily into the regular ration for consistent daily use. Liquids can be measured precisely and poured over feed, a format some owners find convenient during travel or routine changes. Choose the form you can give reliably and according to the label, and check with your veterinarian if you are unsure which fits your horse's needs.