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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.
Hay Replacer Pellets (Kelley’s Feed)
FiberFiber
ForageForage
Hay StretcherHay Stretcher
NutritionNutrition
Kelley's Hay Replacer Pellets is a forage replacement made of alfalfa, bermuda, and mixed grasses. It also contains added molasses, vitamins, and minerals. This pelleted hay replacer is intended for all horses and ponies, especially those who have trouble chewing.
HaySaver (Hoffman’s Horse Products)
Gut HealthGut Health
Hay StretcherHay Stretcher
Low NSC FeedsLow NSC Feeds
NutritionNutrition
Hoffman's HaySaver is a cubed ration designed to be fed when hay quality is poor or good quality hay is limited. Hoffman's HaySaver has an NSC% of 20%, and uses both inorganic and organic trace minerals.
Head Start Plus Colostrum (Doctor’s Choice Supplements)
FoalFoal
GrowthGrowth
Mineral BalanceMineral Balance
VitaminsVitamins
Head Start Plus Colostrum is a foal supplement intended to provide vitamins, minerals, probiotics, prebiotics, and colostrum to help support immune function, gut health, and overall wellness.
Healthy Balance Farmland Recipe Horse Feed (Dr. Pol)
Caloric EnergyCaloric Energy
HealthHealth
NutritionNutrition
SeniorSenior
Healthy Balance Farmland Recipe Horse Feed is an extruded feed that intends to enhance coat health and promotes lean muscle growth while supporting senior horses with bad or missing teeth.
Healthy Evolution Farmland Recipe Horse Feed (Dr. Pol)
DentalDental
GrainsGrains
Mineral BalanceMineral Balance
VitaminsVitamins
Healthy Evolution Farmland Recipe Horse Feed is an extruded feed intended to enhance coat health and promote lean muscle growth for pregnant/lactating mares and growing foals.
Healthy Minerals For Horses (New Country Organics)
HealthHealth
ImmunityImmunity
Mineral BalanceMineral Balance
PerformancePerformance
Healthy Minerals For Horses by New Country Organics is a premixed free-choice loose mineral for horses. It is intended to help boost overall animal performance and meat and milk production.
Hemogen Solution (Manna Pro)
Blood CellsBlood Cells
EnergyEnergy
StaminaStamina
VitaminsVitamins
Hemogen Solution by Manna Pro is an iron supplement with other minerals and B vitamins. Hemogen Solution from Manna Pro is intended to improve energy and stamina.
Heritage 14% Textured with 8% Fat (Big V Feeds)
Complete FeedComplete Feed
FoalFoal
MareMare
PerformancePerformance
Heritage 14% Textured with 8% Fat by Big V Feeds is a feed with a high protein, high fat, and moderate level of fibre. This feed includes ingredients such as oats, soybean meal, and vitamins and minerals.
Hi Fat Hi Fibre Pellets (Sharpe Farm Supplies)
Caloric EnergyCaloric Energy
FatFat
FiberFiber
Gut HealthGut Health
Sharpe Hi Fat Hi Fibre Pellets is a horse feed formulated to provide caloric energy primarily from fat and digestible fibre.
Hi-E 11:10 Horse Pellet (Bartlett Milling) [Discontinued]
Complete FeedComplete Feed
FatFat
FiberFiber
ProteinProtein
Hi-E 11:10 Horse Pellet is an 11% protein and 10% fat complete feed that utilizes wheat middlings, corn products, soy hulls, alfalfa meal and soy oil as its energy sources.
Hi-Fat Horse Pellet (Bryant Grain)
FatFat
ImmunityImmunity
NutritionNutrition
SeniorSenior
Hi-Fat Horse Pellet from Bryant Grain contains 5% fat and 13% crude protein. This feed is intended for the maintenance of mature horses.
High Country Sweet (Kelley’s Feed)
Caloric EnergyCaloric Energy
ExerciseExercise
FlavorFlavor
NutritionNutrition
High Country Sweet by Kelley's Feed is a grain-based feed with added vitamins and minerals. It contains oats, barley, and corn. It is formulated to provide 12% crude protein.
High Energy 11:8 Sweet Horse (Bartlett Milling) [Discontinued]
Caloric EnergyCaloric Energy
ExerciseExercise
FlavorFlavor
PerformancePerformance
High Energy 11:8 Sweet Horse is a sweet feed intended for working horses that require additional energy. It provides 11% protein and 8% fat from corn, oats, and soybean oil.
High Fat Horse Nugget (Alfa Force Equine)
Complete FeedComplete Feed
FiberFiber
NutrientsNutrients
NutritionNutrition
High Fat Nuggets by Alfa Force Equine is a pelleted feed that can replace all forage. It is intended for pleasure, performance, or breeding horses.
High Fat Horse Pellet (Alfa Force Equine)
FatFat
HealthHealth
NutrientsNutrients
NutritionNutrition
High Fat Horse Pellet by Alfa Force Equine is a pelleted feed intended for all classes of horses.
High Fat Pellets (Ritchie Smith – Harmony)
Complete FeedComplete Feed
EnergyEnergy
Low NSC FeedsLow NSC Feeds
MetabolismMetabolism
High Fat Pellets from Ritchie Smith's Harmony is a complete feed that has a low NSC value and is ideal for hard keepers, performance horses, stallions, horses who need slow release energy or horses with metabolic issues. It can help with immunity, hooves and skin, and gut health.
High Fibre Pellets (Ritchie Smith – Harmony)
FiberFiber
HealthHealth
Low NSC FeedsLow NSC Feeds
NutritionNutrition
High Fibre Pellets from Ritchie Smith's Harmony is a low NSC feed intended for easy keepers or horses who have metabolic issues. This feed is 13% crude protein and 5% fat.
High Performance (Thomas Moore Feed)
EnergyEnergy
NutrientsNutrients
PerformancePerformance
YeastYeast
High Performance from Thomas Moore Feed is a high energy feed that is intended for performance horses. It also contains minerals, vitamins and yeast.
High Point Pellets (HorseTech)
Gut HealthGut Health
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
High Point Pellets by HorseTech is a pelleted vitamin and mineral supplement formulated to balance forage-based diets and support overall health. It also contains added prebiotics to promote optimal digestive function.
High Point-Alfalfa Hay (HorseTech)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
High Point- Alfalfa from HorseTech is a vitamin and mineral supplement which is designed to be fed in alfalfa-based diets. The 3-ounce feeding rate provides phosphorus and essential vitamins as well as trace minerals.
High Point-Grass/Mixed Hay (HorseTech)
HealthHealth
ProbioticProbiotic
Ration BalancerRation Balancer
VitaminsVitamins
High Point-Grass/Mixed Hay is a vitamin-mineral supplement formulated for horses consuming grass or mixed hay diets. This supplement provides a higher calcium-phosphorous ratio.
High Step (Equi-lete)
Easy KeeperEasy Keeper
Hoof HealthHoof Health
ImmunityImmunity
Skin + HairSkin + Hair
High Step by Equi-lete is a vitamin and mineral supplement intended to support overall health in pleasure horses, easy keepers and non-performance horses.
High VAULTage (Equi-lete)
HealthHealth
Mineral BalanceMineral Balance
PerformancePerformance
VitaminsVitamins
High VAULTage by Equi-lete is a vitamin and mineral supplement intended to support health, performance and recovery in performance horses and hard keepers.
High-Fat Sweet 10 (Manna Pro) [Discontinued]
Complete FeedComplete Feed
FlavorFlavor
HealthHealth
NutritionNutrition
High-Fat Sweet 10 from Manna Pro is designed for active pleasure horses, broodmares, and stallions. It contains 10% crude protein, 5% crude fat, 10% crude fibre, and uses inorganic trace minerals.
Hiland’s Big Sky Mineral (Hiland Supply Co. Ltd)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Hiland's Big Sky Mineral by Hiland Supply Co. Ltd is a mineral supplement intended to support overall health in all horse types.
Hoof + Hair (Bluebonnet Feeds)
Coat QualityCoat Quality
Hoof HealthHoof Health
NutrientsNutrients
Skin + HairSkin + Hair
Hoof + Hair by Bluebonnet Feeds is a vitamin and mineral supplement intended to support healthy hooves and coat in all horse types.
Hoof Pro Plus (Excel Equine)
HealthHealth
Hoof HealthHoof Health
NutrientsNutrients
RecoveryRecovery
Hoof Pro Plus by Excel Equine is a pelleted hoof supplement formulated to support normal hoof growth and overall hoof quality. It contains biotin, methionine, calcium, and zinc.
Hoof-N-Sole (Iron Horse)
Coat QualityCoat Quality
HealthHealth
Hoof HealthHoof Health
ImmunityImmunity
Hoof-N-Sole from Iron Horse is a pelleted supplement intended to maximize hoof growth. This supplement contains essential amino acids, trace vitamins and minerals intended to improve coat health.
Horse & Mule (West Feeds)
Easy KeeperEasy Keeper
FiberFiber
GrainsGrains
NutritionNutrition
Horse & Mule by West Feeds is a feed meant for your pasture pals, with a lower amount of protein of 10% and a high amount of fibre of 20%. This feed includes ingredients such as molasses and vegetable oil to increase palatability.
Horse Block (DuMor)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
ProteinProtein
DuMor Horse Block is a vitamin, mineral, and protein supplement for horses in a block format. It contains predominantly inorganic trace minerals and is intended to be offered free choice.
Horse Crunchies (Hoffman’s Horse Products)
Easy KeeperEasy Keeper
FlavorFlavor
HealthHealth
NutritionNutrition
Horse Crunchies from Hoffman's is a cubed treat for horses. Horse Crunchies are 22% NSC and are intended to be a healthy treat option for horses.
Horse Cubes (Alfa Force Equine)
HealthHealth
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
NutritionNutrition
Horse Cubes by Alfa Force Equine is a pelleted feed intended for all classes of horses.
Horse Guard
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Horse Guard is a pelleted, concentrated vitamin-mineral supplement designed for all classes of horses. The recommended feeding rate is 2 oz per day.
Horse Low Starch Ration Balancer (Modesto Milling)
FiberFiber
ProteinProtein
Ration BalancerRation Balancer
VitaminsVitamins
Horse Low Starch Ration Balancer from Modesto Milling is a ration balancer containing 20% protein, 19% fiber and 9.7% fat. It also contains vitamins and minerals.
Horse Maintenance Formula (Bartlett Milling) [Discontinued]
Easy KeeperEasy Keeper
HealthHealth
NutritionNutrition
Ration BalancerRation Balancer
Bartlett Horse Maintenance Formula is a 13.5% protein and 3.5% fat pelleted feed. It is designed to supply a lower energy density for horses at maintenance.
Horse Mineral (Hoffman’s Horse Products)
DigestionDigestion
HealthHealth
Mineral BalanceMineral Balance
VitaminsVitamins
Hoffman's Horse Mineral is an equine mineral and vitamin supplement primarily intended for free-choice feeding large herds. It does not contain sugars, grains, or added starches.
Horse Munch (Bartlett Milling) [Discontinued]
Caloric EnergyCaloric Energy
Easy KeeperEasy Keeper
FlavorFlavor
Ration BalancerRation Balancer
Bartlett Horse Munch is a pelleted feed containing added molasses. It is formulated for horses at maintenance or easy keepers with 15% fibre, 14% protein, and 3.5% fat.
Horse Nugget (Alfa Force Equine)
HealthHealth
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
NutritionNutrition
Horse Nugget by Alfa Force Equine is a pelleted feed intended for all classes of horses.
Horse Pellet 110 Plus (Bartlett Milling) [Discontinued]
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
ProteinProtein
Horse Pellet 110 Plus is an 11% protein and 5% fat complete feed with added lysine and methionine. Energy sources include wheat middlings, ground corn, soybean hulls, and alfalfa meal.
Horse PLUS (Modesto Milling)
Caloric EnergyCaloric Energy
GrainsGrains
NutritionNutrition
ProteinProtein
Horse PLUS by Modesto Milling is a textured horse feed made using mostly organic ingredients. This feed contains grains, alfalfa, coconut meal, sunflower seeds, carrot pellets, flaxseed as well as added vitamins and minerals. It provides 12% crude protein, 4.5% fat and 13% crude fiber.
Horse Plus (Thrive Essential)
Mineral BalanceMineral Balance
PrebioticPrebiotic
ProbioticProbiotic
ProteinProtein
Horse Plus by Thrive Essential is a powdered daily vitamin and mineral supplement intended for all classes of horses. It is high in protein, and contains pre- and probiotics although the concentration is not disclosed.
Horse Power (Lakeland Feeds)
FiberFiber
HealthHealth
NutrientsNutrients
NutritionNutrition
Horse Power from Lakeland Feeds is a pelleted equine feed formulated with flax and rice bran. Horse Power is intended to aid in joint, hoof and coat health in horses of various life stages and work levels.
Horse Senior Pellets (Modesto Milling)
Caloric EnergyCaloric Energy
GrainsGrains
ProteinProtein
SeniorSenior
Horse Senior Pellets by Modesto Milling is a concentrate feed that provides supplemental energy, vitamins, and minerals with mainly organic ingredients. The pellets contain 14% crude protein, 7.2% fat and 13.5% crude fiber.
Horse Supplement Pellets (Modesto Milling)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Modesto Milling Horse Supplement Pellets is a pelleted source of energy, protein, vitamins, and minerals that can be added to a horse ration. The pellets are made with organic oats, alfalfa, coconut meal, and sesame meal.
Horse Tub (Agassiz Feeds)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Horse Tub by Agassiz Feeds is a molasses-based protein, energy, mineral, and vitamin lick. It is designed for free-choice use and contains a minimum of 14% crude protein.
Horse-Manna Performance Supplement (Manna Pro)
Caloric EnergyCaloric Energy
DigestionDigestion
PerformancePerformance
ProteinProtein
Horse-Manna Performance Supplement is intended to supplement energy and protein in an equine ration. It contains soybean meal, corn, hominy, oatmeal, whey, and linseed meal.
Horse-Manna Vitality Supplement (Manna Pro)
Coat QualityCoat Quality
FatFat
ProteinProtein
YeastYeast
Horse-Manna Vitality Supplement contains soybean meal, flaxseed, whey, and alfalfa meal to add protein to the equine ration. It also provides some minerals and vitamins.
Horseman’s Elite Horse/Mare Cubes (Bluebonnet Feeds)
BroodmareBroodmare
FiberFiber
FoalFoal
GrowthGrowth
Horseman's Elite Horse/Mare Cubes from Bluebonnet is a pasture supplement intended for broodmares. It comes in a 3/4" cube format and contains organic minerals.
Horseman’s Elite Mare & Foal Nugget (Bluebonnet Feeds)
BroodmareBroodmare
FoalFoal
GrowthGrowth
NutrientsNutrients
Horseman's Elite Mare & Foal Nuggets from Bluebonnet is a pelleted feed intended for pregnant, lactating, and growing horses. It provides 16% crude protein and contains soybean oil for added calories.
Horseman’s Elite Pelleted (Bluebonnet Feeds)
GrainsGrains
NutrientsNutrients
PerformancePerformance
ProbioticProbiotic
Horseman's Elite Pelleted feed from Bluebonnet Feed is intended for horses of all life stages and exercise levels. It contains 14% crude protein, added fat from soybeans, organic minerals, and biotin.

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