10 Best Horse Calming Supplements 2025: According to Reviews | Chewy

The 10 Best Horse Calming Supplements

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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
355
$51.84Chewy Price
($0.40/serving)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Dosage and Administration

4.6/5
Excellent

Effectiveness

4.6/5
Excellent

Ingredients

4.7/5
Excellent

Long-Term Effects

4.4/5
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

Farm Animal Type

Horse

Food Form

Supplement
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

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

Rated 4.8 out of 5 stars
133
$90.20Chewy Price
($0.85/serving)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Dosage and Administration

4.7/5
Excellent

Effectiveness

4.7/5
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, 10-lb bag
Formula 707 Calming Apple Flavor Pellets Horse Supplement, 10-lb bag
Formula 707 Calming Apple Flavor Pellets Horse Supplement, 10-lb bag
Formula 707 Calming Apple Flavor Pellets Horse Supplement, 10-lb bag
Formula 707 Calming Apple Flavor Pellets Horse Supplement, 10-lb bag
Formula 707 Calming Apple Flavor Pellets Horse Supplement, 10-lb bag

Formula 707 Calming Apple Flavor Pellets Horse Supplement, 10-lb bag

Rated 4.5 out of 5 stars
285
$80.83Chewy Price
($1.02/serving)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Dosage and Administration

4.5/5
Great

Effectiveness

4.4/5
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
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 4.8 out of 5 stars
96
$62.34Chewy Price
($0.48/serving)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Dosage and Administration

4.6/5
Excellent

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

Farm Animal Type

Horse

Food Form

Supplement
5
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
36
$27.95Chewy Price
($5.59/lb)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Dosage and Administration

4.5/5
Great

Effectiveness

4.5/5
Great

Ingredients

4.5/5
Great

Long-Term Effects

4.5/5
Great

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
6
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 4.6 out of 5 stars
55
$32.99Chewy Price
($1.27/serving)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Dosage and Administration

4.5/5
Great

Effectiveness

4.6/5
Excellent

Ingredients

3.8/5
Good

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
7
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 4.7 out of 5 stars
48
$19.99Chewy Price
($0.13/serving)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Dosage and Administration

4.7/5
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
8
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 4.6 out of 5 stars
32
$89.50Chewy Price
($2.99/ea)
Promo, Save 40% on first Autoship with code EQSUP

Our ratings

Dosage and Administration

4.5/5
Great

Effectiveness

4.4/5
Great

Ingredients

4.5/5
Great

Long-Term Effects

4.3/5
Great

Is this horse calming supplement right for my pet?

Top Ingredients

Alfalfa Meal, Molasses, Equience

Special Diet

Plant Based, Human-Grade, Vegan, Natural...

Food Flavor

Molasses, Hay

Farm Animal Type

Horse
9
Finish Line Thia-Cal Liquid B1 Calming Liquid Horse Supplement, 128-fl oz bottle
Finish Line Thia-Cal Liquid B1 Calming Liquid Horse Supplement, 128-fl oz bottle
Finish Line Thia-Cal Liquid B1 Calming Liquid Horse Supplement, 128-fl oz bottle
Finish Line Thia-Cal Liquid B1 Calming Liquid Horse Supplement, 128-fl oz bottle

Finish Line Thia-Cal Liquid B1 Calming Liquid Horse Supplement, 128-fl oz bottle

Rated 4.4 out of 5 stars
30
$31.99Chewy Price
($0.25/serving)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Dosage and Administration

4.8/5
Excellent

Effectiveness

4.8/5
Excellent

Ingredients

4.7/5
Excellent

Long-Term Effects

4.7/5
Excellent

Is this horse calming supplement right for my pet?

Lifestage

All Lifestages, Adult

Top Ingredients

Calcium 100mg - 160mg, Salt 2800mg - 3200mg, Sodium 1000mg - 1400mg, Potassium 1500mg, Magnesium 100mg

Special Diet

Flax-Free, Grain-Free, No Corn No Wheat No Soy

Farm Animal Type

Horse
10
Vetoquinol Zylkene Equine Behavior Support Apple Flavor Powder Horse Supplement 2000 mg, 20 count
Vetoquinol Zylkene Equine Behavior Support Apple Flavor Powder Horse Supplement 2000 mg, 20 count
Vetoquinol Zylkene Equine Behavior Support Apple Flavor Powder Horse Supplement 2000 mg, 20 count
Vetoquinol Zylkene Equine Behavior Support Apple Flavor Powder Horse Supplement 2000 mg, 20 count
Vetoquinol Zylkene Equine Behavior Support Apple Flavor Powder Horse Supplement 2000 mg, 20 count
Vetoquinol Zylkene Equine Behavior Support Apple Flavor Powder Horse Supplement 2000 mg, 20 count
Vetoquinol Zylkene Equine Behavior Support Apple Flavor Powder Horse Supplement 2000 mg, 20 count
Vetoquinol Zylkene Equine Behavior Support Apple Flavor Powder Horse Supplement 2000 mg, 20 count

Vetoquinol Zylkene Equine Behavior Support Apple Flavor Powder Horse Supplement 2000 mg, 20 count

Rated 4.2 out of 5 stars
60
$174.99Chewy Price
($87.50/serving)
Promo, New Customers Only: Spend $49+, Get $20 eGift Card

Our ratings

Dosage and Administration

4.5/5
Great

Effectiveness

4.4/5
Great

Ingredients

4.4/5
Great

Long-Term Effects

4.5/5
Great

Is this horse calming supplement right for my pet?

Lifestage

All Lifestages, Adult

Top Ingredients

Maltodextrin, Dried Hydrolyzed Casein, Apple Flavor

Food Flavor

Apple, Fruits & Vegetables

Farm Animal Type

Horse