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Selenium - Feed Ingredient

Selenium is an essential trace mineral required in equine nutrition for its role in antioxidant defense, immune function, and thyroid hormone metabolism. It is a key component of glutathione peroxidase, an enzyme that helps protect cells from oxidative damage by neutralizing free radicals. Selenium also plays a role in muscle function and overall metabolic health.

Horses can obtain selenium from forages, but its content varies depending on soil selenium levels in different regions. In areas with selenium-deficient soils, supplementation is necessary to prevent deficiencies, which can lead to conditions such as white muscle disease, impaired immune function, and poor reproductive health. Selenium is commonly supplemented in the form of sodium selenite, sodium selenate, or organic selenium sources such as selenium yeast, which is considered more bioavailable.

Because selenium has a narrow margin of safety, excessive intake can lead to toxicity, characterized by symptoms such as hair loss, hoof abnormalities, and neurological issues. Proper formulation and monitoring of selenium intake are essential to ensure optimal health in horses.

The following equine feeds, supplements and products contain Selenium as an ingredient.

Feeds, Supplements & Products
AminoTrace+ Vitamin and Mineral Supplement (Mad Barn)
Hoof HealthHoof Health
Metabolic SyndromeMetabolic Syndrome
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
AminoTrace+ by Mad Barn is a complete, balanced equine mineral and vitamin supplement designed for horses with metabolic concerns. It is ideal for horses with IR, PPID, or high iron in the diet.
Natural E/Organic Se (Mad Barn)
AntioxidantAntioxidant
Organic Trace MineralsOrganic Trace Minerals
RecoveryRecovery
VitaminsVitamins
Natural E/Organic Se is a pelleted supplement providing organic Selenium yeast and natural Vitamin E. These two nutrients are important antioxidants that support muscle function and anti-inflammatory pathways.
Omneity P – Pellets – Vitamin & Mineral Supplement (Mad Barn)
Gut HealthGut Health
Hoof HealthHoof Health
Mineral BalanceMineral Balance
Organic Trace MineralsOrganic Trace Minerals
Ration BalancerRation Balancer
Omneity Pellets is a balanced mineral and vitamin supplement for horses in a palatable pellet form. It provides 100% organic trace minerals, complete B-vitamin fortification, added Vitamin E, yeast and digestive enzymes.
Omneity Premix – Vitamin & Mineral Supplement (Mad Barn)
Hoof HealthHoof Health
Mineral BalanceMineral Balance
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Omneity Premix is a balanced mineral and vitamin supplement for horses providing 100% organic trace minerals, complete B-vitamin fortification, added Vitamin E, yeast, and digestive enzymes.
Trace Mineral Pak (Mad Barn)
Coat QualityCoat Quality
ExerciseExercise
Hoof HealthHoof Health
Organic Trace MineralsOrganic Trace Minerals
Trace Mineral Pak from Mad Barn is a balanced equine supplement providing 100% organic (chelated) trace minerals. Ingredients include selenium, zinc, copper, and manganese.
Amber Grains Classic Senior Textured (Coker Feed Mill)
DigestionDigestion
FiberFiber
Gut HealthGut Health
SeniorSenior
Amber Grains Classic Senior Textured by Coker Feed Mill is a textured feed intended to support digestion and body condition in senior horses.
Amber Grains Elite 10-10 Performance (Coker Feed Mill)
DigestionDigestion
EnergyEnergy
MuscleMuscle
PerformancePerformance
Amber Grains Elite 10-10 Performance by Coker Feed Mill is a high calorie textured feed intended to support digestion, muscle gain and endurance in performance horses.
Amber Grains Elite 12-12 Performance (Coker Feed Mill)
DigestionDigestion
EnergyEnergy
Gut HealthGut Health
PerformancePerformance
Amber Grains Elite 12-12 Performance by Coker Feed Mill is a textured feed intended to provide cool energy for performance horses.
Amber Grains Elite Front Runner (Coker Feed Mill)
Caloric EnergyCaloric Energy
EnergyEnergy
Gut HealthGut Health
PerformancePerformance
Amber Grains Elite Front Runner by Coker Feed Mill is a high-energy feed intended for performance. It is formulated to support strength, stamina and endurance in horses.
Amber Grains Elite Mare and Foal (Coker Feed Mill)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Amber Grains Elite Mare and Foal by Coker Feed Mill is a textured feed intended to support overall health in pregnant mares, lactating mares and growing foals.
Amber Grains Elite Serenity Ultra LS (Coker Feed Mill)
HealthHealth
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
SeniorSenior
Amber Grains Elite Serenity Ultra LS by Coker Feed Mill is a low NSC (8.94%) pelleted feed intended for horses with sensitive digestive systems.
Amber Grains Elite Super Senior (Coker Feed Mill)
DigestionDigestion
FiberFiber
ProbioticProbiotic
SeniorSenior
Amber Grains Elite Super Senior by Coker Feed Mill is a textured feed intended to support overall health and digestion in senior horses.
Amplify High Fat Supplement (Purina Mills)
Coat QualityCoat Quality
Competition HorsesCompetition Horses
FatFat
Weight IssuesWeight Issues
Amplify High Fat Supplement is an extruded fat supplement that includes rice bran, flax seed and vegetable oil. It provides added calories for horses that have higher energy needs.
Apple Smacks Horse Treats (Star Milling Co)
Caloric EnergyCaloric Energy
GrainsGrains
NutritionNutrition
ProteinProtein
Apple Smacks by Star Milling Co is an apple-flavoured treat designed to be fed in small amounts as a special treat. It contains no less than 14.0% protein and is fortified with minerals and vitamins.
Arizona Copper Complete (Horse Tech)
HealthHealth
Mineral BalanceMineral Balance
Ration BalancerRation Balancer
VitaminsVitamins
Arizona Copper Complete is a vitamin and mineral supplement for horses containing copper and other trace minerals in an organic amino acid complex. The supplement also provides vitamins and amino acids in a milled flax base.
Artoa Pellets (Ametza)
FiberFiber
ForageForage
GrainsGrains
PerformancePerformance
Artoa Pellets by Ametza is a pelleted feed that provides energy through sources such as alfalfa hay and cracked corn. It contains a low grain level to minimize a variety of metabolic issues.
Back in Balance Equine Mineral – [Discontinued]
HealthHealth
Organic Trace MineralsOrganic Trace Minerals
Ration BalancerRation Balancer
VitaminsVitamins
Back in Balance Equine Mineral is a now-discontinued mineral premix for horses and other species. It used kelp as the ingredient carrier and provided organic trace minerals.
Balance I (AniMed)
Amino AcidAmino Acid
HealthHealth
Mineral BalanceMineral Balance
VitaminsVitamins
Balance I from AniMed is a supplement that states it aids in health and body condition of horses by containing amino acids, fatty acids, vitamins and minerals, and antioxidants. It claims to be formulated for horses fed alfalfa hay.
Balance II (AniMed)
Amino AcidAmino Acid
HealthHealth
Mineral BalanceMineral Balance
VitaminsVitamins
Balance II from AniMed is a supplement that states it aids in health and body condition of horses by containing amino acids, fatty acids, vitamins and minerals, and antioxidants. It claims to be formulated for horses fed grass hay.
Balance Supplement (Peninsula Performance Feeds)
HealthHealth
ImmunityImmunity
Mineral BalanceMineral Balance
NutritionNutrition
Balance Supplement from Peninsula Performance Feeds is a pelleted ration balancing supplement for horses. Balance Supplement contains chelated trace minerals and is intended to be fed as the sole ration for easy keepers.
Balanced (Hygain)
Hoof HealthHoof Health
Mineral BalanceMineral Balance
Ration BalancerRation Balancer
VitaminsVitamins
Balanced by Hygain is feed that intends to be fed as a ration balancer, providing a protein level of 25%, minerals, and vitamins for horses that are easy keepers or on a pasture-only diet.
Balancer (Triple Crown)
Easy KeeperEasy Keeper
Metabolic SyndromeMetabolic Syndrome
NutritionNutrition
Ration BalancerRation Balancer
Triple Crown® Balancer is a pelleted mineral and vitamin supplement providing 30% protein, 3% fat and 5% fibre. This ration balancer contains essential amino acids, vitamins, macro minerals, trace minerals, bacteria and enzymes.
Balancer Gold (Triple Crown)
Easy KeeperEasy Keeper
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Ration BalancerRation Balancer
Balancer Gold is a soy-free ration balancer with 13.5% protein, 4.5% fat and 14.2% NSC. It has a lower feeding rate and can be used alone or in combination with other complete feeds or feed ingredients.
BalancI.R. Ration (Hoffman’s Horse Products)
Complete FeedComplete Feed
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Ration BalancerRation Balancer
Hoffman's BALANCI.R. Horse Ration is an 11% NSC pelleted feed for horses that require a low-starch diet. Energy sources include soybean hulls, stabilized rice bran, malt sprouts, and oat hulls.
Barn Bag (Life Data Labs Inc)
Easy KeeperEasy Keeper
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Barn Bag by Life Data Labs Inc is a pelleted supplement that is intended as a ration balancer for the easy keepers and horses on pasture. It is a low-calorie and low-starch feed that provides vitamins, minerals, amino acids, and fatty acids.
Base Mix P55 (Uckele)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Base Mix P55 is a powdered vitamin and mineral supplement intended for pregnant or lactating mares, growing foals, and performance horses. This supplement contains balanced calcium to potassium ratio.
Bermuda Pellets (Ametza)
FiberFiber
ForageForage
Mineral BalanceMineral Balance
VitaminsVitamins
Bermuda Pellets by Ametza is a pelleted feed that contains Bermuda hay. This feed is intended for animals with allergies to alfalfa or those that need a low protein feed due to metabolic issues.
Bermuda Plus Pellets (Mountain Sunrise Feed Co)
FiberFiber
ForageForage
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
Bermuda Plus Pellets by Mountain Sunrise Feed Co contains a vitamin/mineral package that is intended for horses with Cushing’s disease or other metabolic conditions that cause high blood sugar.
Big V 12-8 Horse Pellet (Big V Feeds)
HealthHealth
NutrientsNutrients
NutritionNutrition
PerformancePerformance
Big V 12-8 Horse Pellet by Big V Feeds is a pelleted feed intended for all horse types.
BioMane Equine Pellets (BioMane)
Amino AcidAmino Acid
Coat QualityCoat Quality
Mineral BalanceMineral Balance
VitaminsVitamins
BioMane Equine Pellets is a horse supplement containing amino acids, vitamins and minerals designed to support hair health. The pellets are composed of organic and inorganic minerals, and contain 14% crude protein, 5% fat and 6% fiber.
Biotin II 22X Pellets (MVP)
Amino AcidAmino Acid
Hoof HealthHoof Health
ProbioticProbiotic
VitaminsVitamins
Biotin II 22X Pellets by MVP is a supplement intended for horses of all life stages that contains a combination of biotin, amino acids, trace minerals and probiotics that intends to help maintain hooves and support growth and repair.
Blue Label 2X (Pennwoods)
HealthHealth
Mineral BalanceMineral Balance
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Blue Label 2X by Pennwoods is a complete vitamin and mineral supplement designed for horses that contains added amino acids and yeast.
Blue Ribbon (Banks Mill Feeds)
Complete FeedComplete Feed
Mineral BalanceMineral Balance
ProteinProtein
VitaminsVitamins
Banks' Blue Ribbon is an all-grain sweet feed composed of oats, corn, cane molasses, and soybean meal. It provides a high (33.4%) NSC value. This feed is intended for all horses and ponies.
Blue Ribbon 12+ (Seminole) – [Discontinued]
Competition HorsesCompetition Horses
GrowthGrowth
LactationLactation
PerformancePerformance
Seminole Blue Ribbon 12+ is a now-discontinued textured horse feed targeted to growing, breeding and performance horses. It provides 12% protein with added lysine.
Blue Ribbon High Efficiency (Seminole) – [Discontinued]
Complete FeedComplete Feed
FatFat
GrowthGrowth
ProteinProtein
Seminole Blue Ribbon High Efficiency is a now-discontinued feed targeted to growing, breeding and performance horses. This high-fat textured feed contains added lysine.
Blueprint Equine Premix GFC (Masterfeeds)
HealthHealth
Mineral BalanceMineral Balance
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Blueprint Equine Premix GFC is a powdered vitamin and mineral supplement to balance forage-based diets. It contains organic trace minerals, yeast meant to support the digestive system and garlic to repel flies and insects.
Bonanza Tuff Horse (Mid-America Feeds)
EnergyEnergy
NutrientsNutrients
NutritionNutrition
VitaminsVitamins
Bonanza Tuff Horse by Mid-America Feeds is a pelleted complete feed intended for all types of horses.
Bonza Horse (Bonza)
Mineral BalanceMineral Balance
MuscleMuscle
Skin + HairSkin + Hair
StaminaStamina
Bonza Horse by Bonza is a powdered mineral equine supplement that can be mixed with feed or dissolved in water. It is intended to support overall health in horses.
Boost ‘Em (Bluebonnet Feeds)
HealthHealth
NutrientsNutrients
Ration BalancerRation Balancer
VitaminsVitamins
Boost 'Em is a pelleted diet balancer from Bluebonnet Feeds that contains protein, fat, vitamins and minerals to contribute to the general health of horses and livestock.
Boredom Buster (Equi-lete)
Mineral BalanceMineral Balance
NutrientsNutrients
NutritionNutrition
VitaminsVitamins
Boredom Buster by Equi-lete is a hanging treat containing vitamins and minerals. It is intended for stalled horses experiencing boredom.
BOS Equus (The Horse Food)
Grain FreeGrain Free
NutrientsNutrients
Omega 3-6-9Omega 3-6-9
ProteinProtein
BOS Equus by The Horse Food is a seed-meal-based feed high in protein and fat. It is intended for any type of horse for any age.
Breed & Grow (Dunstan)
BroodmareBroodmare
FiberFiber
FoalFoal
GrowthGrowth
Breed & Grow by Dunstan is a high fibre pellet intended to provide nutrients to pregnant and lactating mares and young horses.
Breeder Tub (Agassiz Feeds)
BroodmareBroodmare
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Breeder Tub by Agassiz Feeds is a mineral and vitamin lick designed for breeding beef cattle. It is molasses-based with no added salt and designed for free-choice use.
Breeders Choice Plus (DAC)
BroodmareBroodmare
NutrientsNutrients
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Breeders Choice Plus by DAC is a powdered vitamin and mineral supplement designed for breeding horses. It contains trace minerals, selenium, and probiotics.
Breeding (Banks Mill Feeds)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Breeding by Banks Mill Feeds is a high-protein textured feed intended for gestating and lactating broodmares, as well as growing foals. This feed contains 26.3% NSC.
Breeding and Growth Formula (Bartlett Milling) [Discontinued]
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Bartlett's Breeding and Growth Formula is a 14% protein and 6% fat sweet feed formulated for breeding, growing and exercising horses. It contains ingredients such as oats, barley, corn, and wheat middlings as its main energy sources.
Broodmare Yearling (Equine Advantage)
BroodmareBroodmare
GrainsGrains
PerformancePerformance
StallionStallion
Broodmare Yearling is formulated to help promote healthy growth and development in horses and ponies. This feed is ideal for broodmares, lactating mares, and breeding stallions to provide essential nutrients.
CADENCE Textured Feed (BUCKEYE Nutrition)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
Competition HorsesCompetition Horses
ToplineTopline
CADENCE™ Textured Feed is a palatable, calorie-dense feed formulated to meet the energy requirements of performance horses. It provides 10% fat with 25% NSC.
CADENCE™ Ultra Sweet Pelleted Feed (BUCKEYE Nutrition)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
DigestionDigestion
FlavorFlavor
CADENCE™ Ultra Sweet Pelleted Feed is a 14% fat and 14% fibre feed designed to provide high-calorie density. It is a sweet feed that contains 22% NSC with added cane molasses.
Calf-Manna Performance Supplement (Manna Pro)
Caloric EnergyCaloric Energy
FatFat
Gut HealthGut Health
ProteinProtein
Calf-Manna® Horses Performance Supplement is a high-protein feed intended for recently weaned foals that are having trouble transitioning to solid feeds. It provides added energy and nutrients.
Caliber Complete Horse Ration (Co-op)
EnergyEnergy
FiberFiber
NutritionNutrition
ProteinProtein
Caliber Complete Horse Ration is an all-in-one feed intended for horses at any life stage. It contains moderate protein (13%) and low fat (2%).
Caliber Mare & Foal Ration (Co-op)
BroodmareBroodmare
GrowthGrowth
LactationLactation
NutritionNutrition
Caliber Mare & Foal Ration is a high protein feed intended for broodmares and growing foals. It is designed with higher nutrient density to meet the needs of gestating and lactating mares.
Caliber Performance Horse Ration (Co-op)
Competition HorsesCompetition Horses
EnergyEnergy
ExerciseExercise
ProteinProtein
Caliber Performance is a high energy textured feed intended for mature performance horses. It provides high protein (15.5%) and moderate fat (5.5%) content.
Caliber Senior & Special Care Horse Ration (Co-op)
Complete FeedComplete Feed
Metabolic SyndromeMetabolic Syndrome
NutritionNutrition
Organic Trace MineralsOrganic Trace Minerals
SeniorSenior
Caliber Senior & Special Care Horse Ration is formulated to meet the nutritional requirements of senior horses, hard keepers or horses with dental issues. It is designed to provide energy from fat and digestible fibre sources and has a higher feeding rate.
Caliber Working Horse Ration (CO-OP)
Complete FeedComplete Feed
ExerciseExercise
Gut HealthGut Health
Organic Trace MineralsOrganic Trace Minerals
Caliber Working Horse Ration is a complete pelleted feed formulated to meet the needs of working horses. It is an energy-dense feed with a lower feeding rate.

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