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Organic Selenium - Feed Ingredient

Organic selenium refers to selenium that is bound to organic compounds, typically in the form of selenomethionine or selenized yeast. Unlike inorganic selenium sources such as sodium selenite or sodium selenate, organic selenium is more bioavailable and efficiently utilized by the horse’s body. It is also considered a safer source of selenium.

Selenium is an essential trace mineral required for antioxidant function, immune support, and muscle integrity. In equine diets, organic selenium is often preferred due to its higher absorption rate and incorporation into proteins, allowing for more sustained selenium availability compared to inorganic forms.

While essential for horses and necessary in diets where soils are selenium deficient, excessive selenium intake can be toxic. Selenium supplementation should be carefully managed to prevent toxicity while ensuring adequate intake for optimal health.

The following equine feeds, supplements and products contain Organic 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.
Simplify (Dove Performance Nutrition)
Mineral BalanceMineral Balance
NutrientsNutrients
PerformancePerformance
VitaminsVitamins
Simplify is a pelleted feed that is meant for any horse. It contains vitamins, minerals, protein, fat and fiber.
Sleek (Banks Mill Feeds)
FatFat
FiberFiber
MuscleMuscle
PerformancePerformance
Sleek by Banks Feed Mill is a high-fat, beet pulp-based feed with low (7%) starch content. It contains 13% fat from flax, rice bran, and soybean oil.
Smart & Simple Vitamin E & Selenium Pellets (SmartPak)
AntioxidantAntioxidant
Mineral BalanceMineral Balance
MuscleMuscle
VitaminsVitamins
Smart & Simple Vitamin E & Selenium Pellets is an alfalfa meal-based pelleted supplement for horses. It provides 1250 IU of synthetic vitamin E and 0.62 mg of organic selenium per 15 gram serving.
SmartEssentials Pellets (SmartPak)
Mineral BalanceMineral Balance
Omega 3-6-9Omega 3-6-9
Ration BalancerRation Balancer
VitaminsVitamins
SmartEssentials Pellets from SmartPak is a vitamin and minerals supplement with added essential fatty acids and amino acids. Omega-3s are sourced from flaxseed and fish oil.
SmartVite Perform (SmartPak)
Competition HorsesCompetition Horses
Mineral BalanceMineral Balance
Ration BalancerRation Balancer
VitaminsVitamins
SmartVite Perform is a pelleted mineral and vitamin supplement intended for performance horses. It includes higher nutrient levels which can support horses in heavy exercise.
SmartVite Perform Senior (SmarkPak)
ImmunityImmunity
Mineral BalanceMineral Balance
SeniorSenior
VitaminsVitamins
SmartVite Perform Senior is a vitamin and mineral supplement for working senior horses. It is also intended to support immunity and provide antioxidants.
SmartVite Thrive (SmartPak)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
SmartVite Thrive is a ration balancer meant to provide adult horses with essential vitamins and minerals in light or no work. It also contains vital amino acids and is highly palatable with vegetable oil, rice bran, and flaxseed meal ingredients.
SmartVite Thrive Senior (SmartPak)
HealthHealth
Mineral BalanceMineral Balance
SeniorSenior
VitaminsVitamins
SmartVite Thrive Senior Pellets is a low feeding rate mineral and vitamin supplement for senior horses. It is formulated with added antioxidants for immune function and increased levels of B vitamins.
Solution 10-10-10 (Tucker Milling)
EnergyEnergy
GrainsGrains
NutrientsNutrients
PerformancePerformance
Solution 10-10-10 by Tucker Milling is a textured feed specially formulated for mature performance horses. With 10% protein, 10% fat, and 10% fiber, it delivers a balanced nutritional profile that meets energy demands while keeping protein levels moderate.
Solution-12 (Tucker Milling)
Complete FeedComplete Feed
DigestionDigestion
FiberFiber
SeniorSenior
Solution 12 by Tucker Milling is a pelleted feed formulated for senior horses and is intended to be fed alongside forage. It includes lactic acid bacteria and yeast to support digestive health, though the specific inclusion levels are not disclosed.
Solutions 10 Pellet (Right Choice)
Amino AcidAmino Acid
Complete FeedComplete Feed
FatFat
NutritionNutrition
Solutions 10 is a 10% protein and 6% fat pelleted complete feed. This feed is formulated for horses in work and at maintenance. It contains both organic and inorganic sources of minerals, yeast, and added amino acids.
Solutions 10 Textured (Right Choice)
Complete FeedComplete Feed
FatFat
Gut HealthGut Health
NutritionNutrition
Solutions 10 Textured by Right Choice is a textured complete feed containing 10% protein, 10% fat, and 26.5% NSC. It is formulated for horses in work and maintenance.
Solutions 12 Pellet (Right Choice)
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
ProteinProtein
Solutions 12 by Right Choice is a textured complete feed intended for horses at work and maintenance. It contains 12% protein and 8% fat with added yeast and amino acids.
Solutions 12 Textured (Right Choice)
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
ProteinProtein
Solutions 12 Textured is a complete feed with 12% protein and 6% fat. It is formulated using corn, oats, barley, and wheat as energy sources. It also contains soybean as a protein source and soybean oil as a fat source.
Solutions 14 Cube (Right Choice)
Complete FeedComplete Feed
FiberFiber
NutritionNutrition
ProteinProtein
Right Choice Solutions® 14 Cube is a cubed feed with 14% protein intended for horses in work and at maintenance. It provides protein from alfalfa meal and extruded soybeans.
Solutions 14 Low Starch Pellet (Right Choice)
Complete FeedComplete Feed
FiberFiber
Low NSC FeedsLow NSC Feeds
NutritionNutrition
Solutions 14 Low Starch is a pelleted complete feed that contains 14% protein and 7% fat. It is formulated for working and maintenance horses and is marketed as a low NSC feed.
Solutions 14 Pellet (Right Choice)
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
ProteinProtein
Solutions 14 Pellet is a complete feed with 14% protein and 6% fat intended for horses at maintenance or in work. It utilizes alfalfa meal and extruded soybeans for protein.
Solutions 14 Textured (Right Choice)
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
ProteinProtein
Solutions 14 Textured is a complete feed containing 14% protein from soybean and alfalfa meal and 6% fat from soybean oil. It contains whole oats, cracked corn, wheat middling's, and molasses as energy sources.
Special 13 (Hallway Feeds)
EnergyEnergy
GrowthGrowth
NutrientsNutrients
Organic Trace MineralsOrganic Trace Minerals
Special 13 by Hallway Feeds is a textured sweet feed formulated with added protein, vitamins, and minerals to support the development of young horses and maintain the health of mature horses
SpeedFeed (Dunstan)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
SpeedFeed by Dunstan is a complete textured feed intended to meet the nutrient requirements of racehorses and performance horses. It is formulated using a highly palatable blend of cereals including Oats, Maise, Barley, Lupins, Sugarbeet, Sunflower Seeds, Vegitable Oils and a Vitamin and Mineral premix.
Sport 14 (Banks Mill Feeds)
BroodmareBroodmare
Caloric EnergyCaloric Energy
FatFat
ProteinProtein
Banks' Sport 14 is a high-protein, high-fat textured feed intended for breeding and performance horses. It contains 16.6% NSC with energy sources including wheat middlings, oats, soybean oil, beet pulp, alfalfa meal, and cane molasses.
Sport 14 (McCauley’s)
FatFat
NutrientsNutrients
PerformancePerformance
ProteinProtein
Sport 14 from McCauley's is a pelleted horse feed. It is intended for racing or performance horses and is meant to support gut health. It is high in fat and protein.
Sport Horse (Dunstan)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
ExerciseExercise
GrainsGrains
Sport Horse by Dunstan is a high-energy complete feed. The feed is intended to be highly digestible, and meet all the requirements of horses in work.
Sport Horse Grass (Uckele)
Mineral BalanceMineral Balance
NutritionNutrition
Ration BalancerRation Balancer
VitaminsVitamins
Sport Horse Grass is a pelleted vitamin, mineral, and amino acid supplement intended for performance horses consuming a grass-based diet. This supplement is intended to support muscular function, joint/tendon maintenance, and recovery.
Sport Horse Mix (Elk Grove Milling)
Caloric EnergyCaloric Energy
FiberFiber
NutrientsNutrients
PerformancePerformance
Sport Horse Mix by Elk Grove Milling is a complete feed containing copra meal to provide cool energy. It is intended for horses in moderate work.
Stable MAX Performance (Elk Grove Milling)
Complete FeedComplete Feed
MareMare
PerformancePerformance
StallionStallion
Stable MAX Performance is a complete feed from Elk Grove Milling intended for performance horses, stallions, and broodmares. It provides probiotics and 14% protein.
Stable MAX Senior Lite (Elk Grove Milling)
Complete FeedComplete Feed
NutritionNutrition
ProbioticProbiotic
SeniorSenior
Stable MAX Senior Lite is a complete feed from Elk Grove Milling intended for senior horses, hard keepers, and metabolic horses. It provides probiotics and 15% protein.
Stable MAX Ultra Mate (Elk Grove Milling)
Complete FeedComplete Feed
Easy KeeperEasy Keeper
ProbioticProbiotic
ProteinProtein
Stable MAX Ultra Mate is a complete feed from Elk Grove Milling intended for easy keepers or horses in light work. It provides probiotics and 30% protein.
Stable Mix (Elk Grove Milling)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
FiberFiber
Gut HealthGut Health
Stable Mix by Elk Grove Milling is a complete pelleted formula intended for all horses. This feed is high in fiber (30%) and can be used to replace forage in a horse's diet.
Stable Mix Futurity (Elk Grove Milling)
GrowthGrowth
PerformancePerformance
PrebioticPrebiotic
ProbioticProbiotic
Stable Mix Futurity by Elk Grove Milling is a pelleted feed intended for young horses in training.
Stable Mix GC (Elk Grove Milling)
Complete FeedComplete Feed
HealthHealth
JointsJoints
NutrientsNutrients
Stable Mix GC by Elk Grove Milling is a complete pelleted feed containing glucosamine and chondroitin. It is intended for horses that show signs of arthritis.
Stable Mix Lite (Elk Grove Milling)
Complete FeedComplete Feed
HealthHealth
Low NSC FeedsLow NSC Feeds
NutrientsNutrients
Stable Mix Lite by Elk Grove Milling is a high fiber feed containing less than 12% NSC. It is intended for easy keepers, or horses needing low sugar and starch diets.
Stallion Max (Hallway)
Caloric EnergyCaloric Energy
NutritionNutrition
Omega 3-6-9Omega 3-6-9
StallionStallion
Stallion Max from Hallway is a fortified high-fat, high-fibre feed formulated for stallions. This feed has added omega-3 fatty acids. Stallion Max contains 14% protein, 6% fat, and 12% fibre. It is recommended to start feeding 'Stallion Diets' 60 to 90 days before breeding season begins.
Staminoats (Hallway)
BroodmareBroodmare
GrowthGrowth
LactationLactation
NutritionNutrition
Staminoats from Hallway is a cubed feed fortified with Stamm 30, formulated for broodmares and young growing horses. This feed provides 14% protein, 3% fat, and 11% fibre.
Stamm 30 (Hallway)
BroodmareBroodmare
FoalFoal
GrowthGrowth
StallionStallion
Stamm 30 from Hallway is a vitamin and mineral pellet formulated for growing, reproducing, recreational and performance horses. This can be fed alone to easy keepers, or used to top dress feed for horses not getting the full feeding rate of concentrate feeds. Stamm 30 is used in other Hallway feeds as the source of vitamins and minerals.
Starch Wise (ProElite)
Gut HealthGut Health
NutritionNutrition
PerformancePerformance
SeniorSenior
ProElite Starch Wise is a pelleted horse feed with a maximum 14.5% NSC. It is formulated with moderate levels of starch and sugar for mature show and performance horses.
Steady Energy Formula (Bartlett Milling) [Discontinued]
EnergyEnergy
FatFat
Grain FreeGrain Free
PerformancePerformance
Bartlett Steady Energy Formula is a pelleted feed intended for mature horses that require lower levels of energy in their diet. It provides 12% protein and 6% fat.
Step 1 Start Right (Trouw Nutrition)
Complete FeedComplete Feed
FoalFoal
GrowthGrowth
LactationLactation
Step 1 Start Right is an extruded feed formulated to meet the nutritional demands of lactating broodmares, foals and weanlings. It can be fed to growing horses up to one year of age.
Step 2 Peak Performance – Sport (Trouw Nutrition)
Complete FeedComplete Feed
FatFat
PerformancePerformance
Weight IssuesWeight Issues
Step 2 Peak Performance - Sport by Trouw is an extruded, high-fat feed formulated to meet the energy demands of horses in heavy work, stallions, growing horses, and hard keepers. It provides 14% protein and 10% fat from vegetable oils.
Step 2 Peak Sweet (Trouw Nutrition) [DISCONTINUED]
Complete FeedComplete Feed
ExerciseExercise
FlavorFlavor
GrowthGrowth
Step 2 Peak Sweet is a textured, high-energy feed for horses in heavy work, stallions, growing horses, and hard keepers. It contains 14% protein and 10% fat.
Step 3 Classic Sweet (Trouw Nutrition)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
FlavorFlavor
Weight IssuesWeight Issues
Step 3 Classic Sweet is a textured sweet feed for mature horses in light to moderate work. It contains whole oats and added sugars to improve palatability.
Step 3 GenAPro (Trouw)
Complete FeedComplete Feed
FiberFiber
Hay StretcherHay Stretcher
Low NSC FeedsLow NSC Feeds
Trouw GenAPro (GAP) is an alfalfa-based, high fibre and low NSC feed with less than 10% sugar and starch content. GenAPro is designed as a partial or total hay replacer when quality forage is limited.
Step 4 Complete – Rocky Mountain Crunch (Trouw Nutrition) [DISCONTINUED]
DigestionDigestion
FiberFiber
Hay StretcherHay Stretcher
Ration BalancerRation Balancer
Step 4 Complete Rocky Mountain Crunch is an extruded, high-fibre feed used to partially replace forage. The kibbles contain 14% protein as well as essential vitamins and minerals.
Step 4 Low Sugar Lite (Trouw Nutrition)
Complete FeedComplete Feed
DigestionDigestion
FiberFiber
Low NSC FeedsLow NSC Feeds
Step 4 Low Sugar Lite by Trouw Nutrition is a high-fibre pelleted feed intended for horses who are prone to founder, sugar sensitivities, insulin resistance and metabolic disorders.
Step 5 Top Up Mineral (Trouw Nutrition)
HealthHealth
Mineral BalanceMineral Balance
Ration BalancerRation Balancer
VitaminsVitamins
Step 5 Top Up Mineral by Trouw Nutrition is a loose mineral supplement intended for horses who need additional vitamins and minerals in their diet.
Step 6 Senior (Trouw Nutrition)
Complete FeedComplete Feed
DentalDental
SeniorSenior
Weight IssuesWeight Issues
Step 6 Senior is a pelleted and extruded feed intended for senior horses and hard keepers. It contains 5% fat, 16% protein and can be given to senior horses with dental issues.
Step 7 Top Up Supplement (Trouw Nutrition)
Easy KeeperEasy Keeper
Gut HealthGut Health
Ration BalancerRation Balancer
VitaminsVitamins
Step 7 Top Up Supplement by Trouw Nutrition is a ration balancer intended to be used when horses are not consuming a complete feed, such as corn, oats or barley. It can be used for over-conditioned horses, horses on pasture and horses with low energy requirements.
Step 8 High Fat (Trouw Nutrition)
Complete FeedComplete Feed
FatFat
PerformancePerformance
Weight IssuesWeight Issues
Step 8 High Fat - Cool Energy by Trouw Nutrition is a pelleted feed intended for performance horses or horses that required fat-sourced energy.
Step Right Horse Mineral (Trouw Nutrition) [DISCONTINUED]
Gut HealthGut Health
HealthHealth
Ration BalancerRation Balancer
VitaminsVitamins
Step Right Horse Mineral (formerly Step 7b Pro Equine Supplement) is a concentrated mineral and vitamin supplement for horses in a loose powdered format. It is intended for horses that are not consuming complete feed, horses on pasture, or easy keepers.
Strucomix Senior (Cavalor)
Complete FeedComplete Feed
DigestionDigestion
FiberFiber
SeniorSenior
Strucomix Senior by Cavalor is a high-fibre feed formulated with puffed and extruded grains to improve digestibility. It contains 14% protein that help support weight and muscle maintenance.

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