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Ingredient

Calcium

Calcium is an essential macromineral required for numerous physiological functions in horses, including bone formation, muscle contraction, nerve transmission, and enzyme activation. It is a primary structural component of bones and teeth, with approximately 99% of the body’s calcium stored in the skeletal system.

In equine nutrition, calcium is commonly supplied through feed ingredients such as limestone (calcium carbonate) or dicalcium phosphate. It can also be added to feed formulations via high calcium feeds like alfalfa.

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

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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.
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.
Optimum Digestive Health Pellets (Mad Barn)
DigestionDigestion
Feed EfficiencyFeed Efficiency
Gut HealthGut Health
ProbioticProbiotic
Optimum Digestive Health from Mad Barn is a probiotic and prebiotic supplement designed to support hindgut health in the horse. It helps to maintain a stable microflora and promote immune health.
Optimum Probiotic (Mad Barn)
DigestionDigestion
Gut HealthGut Health
ImmunityImmunity
ProbioticProbiotic
Mad Barn's Optimum Probiotic is a pure 5-strain probiotic supplement in a powdered format. It provides 20 billion CFU per serving of L. acidophilus, L. fermentum, L. casei, L. plantarum, and L. farciminis.
Performance XL: Electrolytes (Mad Barn)
Competition HorsesCompetition Horses
ElectrolyteElectrolyte
PerformancePerformance
StaminaStamina
Performance XL: Electrolytes by Mad Barn is a scientifically formulated equine electrolyte supplement designed to support athletic performance and workout recovery. It contains an ideal blend of natural minerals and vitamins to promote hydration status and muscle function.
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.
Visceral+ (Mad Barn)
DigestionDigestion
Gut HealthGut Health
ImmunityImmunity
ProbioticProbiotic
UlcersUlcers
YeastYeast
Visceral+ by Mad Barn is a pelleted gut supplement designed to support stomach and hindgut health in horses. It helps maintain normal digestive function, supports gastric comfort, and helps maintain the immune system.
Nu-Hoof Accelerator (Select the Best)
Amino AcidAmino Acid
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
Nu-Hoof Accelerator from Select the Best is a hoof supplement that contains biotin, B-vitamins, zinc, copper, and the amino acids lysine and methionine.
Nu-Hoof Maximizer (Select The Best)
Amino AcidAmino Acid
Hoof HealthHoof Health
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Nu-Hoof Maximizer by Select The Best is a powdered supplement that provides nutrients important to hoof quality. These include biotin, methionine, copper and zinc.
Nutrequin Classic Formula Supplement (Equistro)
HealthHealth
NutritionNutrition
Ration BalancerRation Balancer
VitaminsVitamins
EQUISTRO's Nutrequin Classic is a vitamin and mineral supplement targeted to performance horses, pregnant mares and growing foals and weanlings. It contains inorganic minerals, wheat germ meal, alfalfa meal and mineral oil.
Nutrequin Elite (Equistro)
Mineral BalanceMineral Balance
NutritionNutrition
PerformancePerformance
VitaminsVitamins
Nutrequin Elite is a vitamin, mineral, and amino acid supplement formulated for performance horses as well as lactating and pregnant mares.
NutrientWise (Wiser Concepts)
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
NutrientWise by Wiser Concepts is a low-calorie vitamin and trace mineral supplement formulated to help balance a horse’s diet.
Nutrimix Plus (Stride Animal Health) – [Discontinued]
Coat QualityCoat Quality
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
Nutrimix Plus from Stride Animal Health is a vitamin and mineral supplement that can support healthy hooves. It can also contribute to hair and coat quality.
NutriStar (St.Hippolyt)
Competition HorsesCompetition Horses
GrowthGrowth
MuscleMuscle
PerformancePerformance
NutriStar by St.Hippolyt is a supplement intended to support muscle maintenance and development in western and leisure horses.
Oat Balancer (Dodson & Horrell)
Amino AcidAmino Acid
MareMare
Ration BalancerRation Balancer
StallionStallion
Oat Balancer by Dodson & Horrell is a ration balancer meant to be fed supplementally with oats. It provides a higher level of vitamin E to support milk quality and fertility.
Oat Balancer Concentrate (Red Mills)
Complete FeedComplete Feed
GrowthGrowth
PerformancePerformance
StallionStallion
Oat Balancer Concentrate from Red Mills is a feed intended for young stock, breeding stock, and racehorses. This pelleted feed is designed to support performance, recovery, coat condition, and growth.
Oat Balancer Cooked Mix (Red Mills)
BroodmareBroodmare
Competition HorsesCompetition Horses
PerformancePerformance
StallionStallion
Oat Balancer Cooked Mix from Red Mills is a feed intended for youngstock, racehorses, and breeding stock. This feed is designed to support performance, recovery, growth, bone integrity, and coat condition.
Oat Balancer Cube (Bluegrass Horse Feed)
BroodmareBroodmare
PerformancePerformance
ProteinProtein
StallionStallion
Oat Balancer Cube is a pelleted ration balancer for horses and ponies in moderate to heavy work. It is intended to be fed alongside oats and other cereals. It contains 24% protein, 3.3% fat, and 8% fibre.
Oat Balancer Mix (Baileys Horse Feeds)
Caloric EnergyCaloric Energy
GrainsGrains
Ration BalancerRation Balancer
VitaminsVitamins
Oat Balancer Mix from Baileys Horse Feeds is intended for racehorses being fed a high oat diet in heavy work. This textured, high-energy feed is formulated to be fed alongside oats to counteract nutrient deficiencies that may come as a cause of feeding only oats.
Oat Balancer Mix (Bluegrass Horse Feed)
BroodmareBroodmare
ProteinProtein
Ration BalancerRation Balancer
StallionStallion
Oat Balancer Mix is a nutrient-dense balancer fed alongside oats and other cereals. It is designed for horses and ponies in moderate to heavy work, stallions, broodmares, and growing horses.
Oat Base (No Corn) (Ace Hi Feeds)
Caloric EnergyCaloric Energy
FlavorFlavor
GrainsGrains
NutrientsNutrients
Oat Base by Ace Hi Feeds is a corn-free, textured equine feed. It contains added vitamins and a blend of organic and inorganic minerals. This textured feed is intended for all horses and ponies.
Oat Free Muesli (Krafft)
DigestionDigestion
Gut HealthGut Health
NutritionNutrition
ProteinProtein
Oat Free Muesli by Krafft is a oat free supplementary feed intended for horses and ponies in light to moderate work. It contains 10% protein, 3% fat, and 10% fibre.
Oatena (Purina)
Caloric EnergyCaloric Energy
ExerciseExercise
HealthHealth
NutrientsNutrients
Purina Oatena is a textured feed intended for active pleasure horses in boarding stables and riding schools. It supplies moderate protein (13%) and low fat (4%) from ingredients such as whole oats, flaked barley, wheat, soy hulls, and soybean oil.
OBS Easy 10 (Ocala Breeders’ Feed and Supply)
Easy KeeperEasy Keeper
FiberFiber
NutritionNutrition
Weight IssuesWeight Issues
OBS Easy 10 by Ocala Breeder’s Supply (OBS) is a complete pelleted feed intended for easy-keepers and horses at maintenance. It provides lower protein (10%) and fat (3.5%) content and is composed of corn, oats, wheat middlings, soybean hulls, alfalfa meal and molasses.
OBS Generation (Ocala Breeders’ Feed and Supply)
FatFat
Mineral BalanceMineral Balance
ProteinProtein
VitaminsVitamins
OBS Generation is a complete pelleted feed formulated for horses at maintenance. It is made with wheat middlings, oats and corn, and provides 14% protein and 6% fat.
OBS Gest-O-Lac (Ocala Breeders Feed & Supply)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
OBS Gest O Lac is a textured horse feed for broodmares in late gestation, lactating mares, and foals. It contains high protein and fat content to support growth and lactation. Yeast culture is added to help support gut health.
OBS Hi-Amo Plus (Ocala Breeders Feed & Supply)
Amino AcidAmino Acid
ExerciseExercise
GrowthGrowth
LactationLactation
OBS Hi-Amo Plus is a textured concentrate feed designed to support growth and reproductive function. It contains added lysine, digestible fibre sources, and selenium yeast.
OBS Mane 10 (Ocala Breeders’ Feed and Supply)
Easy KeeperEasy Keeper
FiberFiber
Mineral BalanceMineral Balance
VitaminsVitamins
OBS Mane 10 is a complete textured feed intended for easy-keepers and pleasure horses. It contains 10% protein and 3.5% fat and contains oats, corn and wheat middlings.
OBS Pellet Plus (Ocala Breeders Feed & Supply)
ExerciseExercise
FoalFoal
GrowthGrowth
LactationLactation
OBS Pellet Plus is a pelleted horse feed with added lysine for horses in training, broodmares, and growing horses. Pellet Plus contains vegetable oil as a source of energy and selenium yeast to support immune and reproductive function.
OBS Performance Blend (Ocala Breeders Feed & Supply)
Caloric EnergyCaloric Energy
Complete FeedComplete Feed
Competition HorsesCompetition Horses
Weight IssuesWeight Issues
OBS Performance Blend is a textured horse feed targeted to yearlings and horses in heavy training or that require improvement in condition. It provides a higher energy density and fat content to support weight management.
OBS Professional Blend (Ocala Breeders Supply)
Competition HorsesCompetition Horses
ExerciseExercise
FatFat
PerformancePerformance
OBS Professional Blend is a complete textured feed intended for high-performance horses. It is formulated with oats, corn and beet pulp and contains 10% fat.
OBS Racing Blend (Ocala Breeders Feed & Supply)
Caloric EnergyCaloric Energy
Competition HorsesCompetition Horses
ExerciseExercise
PerformancePerformance
OBS Racing Blend is a horse feed formulated for racehorses. Racing Blend provides a higher energy density to meet the needs of horses in heavy training. This feed contains beet pulp and steam-crimped oats.
OBS Radiant Supplement (Ocala Breeders’ Feed and Supply)
Caloric EnergyCaloric Energy
FatFat
PerformancePerformance
Weight IssuesWeight Issues
OBS Radiant Supplement is targeted to performance horses requiring additional calories. It contains 22% fat and 18% protein and consists of rice bran, wheat middlings, soybeans and flaxseed.
OBS Sport Feed (Ocala Breeders’ Feed and Supply)
Amino AcidAmino Acid
Caloric EnergyCaloric Energy
ExerciseExercise
PerformancePerformance
OBS Sport Feed is a complete feed intended for performance horses. It is formulated with wheat middlings, soybean hulls and alfalfa meal. It contains 13% protein and 10% fat.
OCD Pellets (Doc’s Products)
Bone HealthBone Health
GrowthGrowth
HealthHealth
JointsJoints
OCD Pellets by Doc's Products is a bone and joint supplement intended for horses. It supplies 900 mg of silicon and 50 mg of hyaluronic acid in each 28 g serving.
Oilovite (NAF Equine)
Coat QualityCoat Quality
HealthHealth
Mineral BalanceMineral Balance
VitaminsVitamins
Oilovite from NAF Equine is intended for all horses and ponies. This supplement is meant to provide vitamins and minerals to support overall health. Oilovite also contains soya, linseed, and hemp oil.
Old Faithful’s Special Blend (Allen & Page)
EnergyEnergy
NutrientsNutrients
SeniorSenior
YeastYeast
Old Faithful’s Special Blend from Allen & Page is intended for senior horses, horses at rest, and horses in light to medium work. It contains mint, yeast, and garlic.
Old Horse (Dunstan)
FiberFiber
Low NSC FeedsLow NSC Feeds
Metabolic SyndromeMetabolic Syndrome
NutrientsNutrients
Old Horse by Dunstan is a high fibre feed intended for older horses at increased risk of metabolic disorders.
Oleo Special (Purina)
Complete FeedComplete Feed
DigestionDigestion
FatFat
HindgutHindgut
Purina Oleo Special is an oiled textured feed for pleasure or performance horse that are housed in boarding stables. It provides 7% fat with ~22% NSC.
Oligosacc (Nature Belisle)
DigestionDigestion
Feed EfficiencyFeed Efficiency
Gut HealthGut Health
PrebioticPrebiotic
Oligosacc is a digestive supplement containing prebiotic oligosaccharides. It is used for calves to decrease the incidence of diarrhea and respiratory illness.
Oligovit Mineral (Reverdy)
HealthHealth
Mineral BalanceMineral Balance
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Oligovit Mineral by Reverdy is a pelleted vitamin and mineral supplement intended for all types of horses and ponies with diets sufficient in calcium, but lacking in trace minerals and vitamins.
Olsen’s All Stock Sweet Textured (Olsen’s Grain)
Easy KeeperEasy Keeper
GrainsGrains
NutrientsNutrients
NutritionNutrition
Olsen's All Stock Sweet Textured from Olsen's Grain is a textured sweet feed intended for horses and ponies at maintenance. This feed contains 12% protein, 2% fat, and 10% fiber.
Omega Advantage (ProElite)
FatFat
GrowthGrowth
Omega 3-6-9Omega 3-6-9
PerformancePerformance
ProElite Omega Advantage is an extruded horse supplement providing 24% fat with added flax. It is intended to provide extra calories and aid in weight gain.
Omega Bran (McCauley’s)
FatFat
Hoof HealthHoof Health
Mineral BalanceMineral Balance
VitaminsVitamins
Omega Bran by McCauley's is a high fat (27.8%) supplement containing vitamins and minerals, it is intended for all horses.
Omega GLO (Thomas Moore Feed)
EnergyEnergy
FatFat
Omega 3-6-9Omega 3-6-9
Weight IssuesWeight Issues
Omega GLO from Thomas Moore Feed is a fat supplement for horses. It is stabilized bran meant to assist with conditioning or weight gain, providing energy, and is intended for hard keepers.
Omega Horseshine (Omega Fields)
Coat QualityCoat Quality
FatFat
Hoof HealthHoof Health
JointsJoints
Omega Horseshine is a stabilized flaxseed, yeast and vitamin-mineral supplement for horses. Flaxseed provides omega-3 fatty acids and can increase the lustre of a coat.
Omega Horseshine COMPLETE (Omega Fields)
FatFat
Hoof HealthHoof Health
Mineral BalanceMineral Balance
Skin + HairSkin + Hair
Omega Horseshine COMPLETE is an omega-3 fatty acid and vitamin-mineral supplement for horses. It is formulated with flaxseed as a source of alpha-linolenic acid, yeast, vitamins and minerals.
Omega Match Ration Balancing Horse Feed (Purina)
EnergyEnergy
FatFat
FiberFiber
ProteinProtein
Purina Omega Match Ration Balancer is a pelleted feed intended for horses at any activity level and life stage. It is designed to fill nutrient gaps from forage or unfortified grains.
OmegaPro (Hestevard)
FatFat
Gut HealthGut Health
JointsJoints
Omega 3-6-9Omega 3-6-9
OmegaPro by Hestevard is a pelleted supplement containing Omega 3 and 6. It is intended to help control inflammation and maintain overall health in horses and ponies.
OMG (Dove Performance Nutrition)
Mineral BalanceMineral Balance
NutrientsNutrients
Ration BalancerRation Balancer
VitaminsVitamins
OMG from Dove Performance Nutrition is a pelleted feed ration for horses. It contains vitamins, minerals, protein, fiber and fat.
Omolene #300® Growth Concentrate (Purina Mills)
BroodmareBroodmare
Complete FeedComplete Feed
FoalFoal
LactationLactation
Omolene 300 Growth is a textured feed designed for foals, weanlings, yearlings and mares in gestation or lactation. It contains 16% crude protein, 6% crude fat and 7% fibre.
Omolene 200 Performance RT (Purina)
BroodmareBroodmare
Complete FeedComplete Feed
Competition HorsesCompetition Horses
GrowthGrowth
Purina® Omolene® #200 RT is a textured feed intended for performance horses, providing 6% fat and 14% fibre. Energy sources include whole grains and a soy oil-molasses blend.
Omolene 400 Complete Advantage (Purina)
DigestionDigestion
ExerciseExercise
Gut HealthGut Health
UlcersUlcers
Purina® Omolene® #400 Complete Advantage is a textured complete feed intended for active pleasure and senior horses. It contains beet pulp shreds, vegetable oils, and a soy oil-molasses blend to improve palatability.
Omolene 400 Complete Advantage RT (Purina)
DigestionDigestion
ExerciseExercise
Gut HealthGut Health
UlcersUlcers
Purina® Omolene® 400 Complete Advantage RT is a textured feed intended for performance horses. It is a calorie-dense blend of 8% fat, 16% fibre and grains.
Omolene 500 Competition (Purina)
Competition HorsesCompetition Horses
DigestionDigestion
EnergyEnergy
NutritionNutrition
Omolene #500® Competition is a textured feed intended for performance and endurance athletes and horses in heavy work. It provides a higher energy density with 8% fat.
Omolene Maternity 300 (Purina Canada)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Purina Omolene Maternity 300 is a textured horse feed intended for broodmares, nursing and growing foals. It provides higher amino acid content to support growth and development.
Omolene Progression 200 (Purina)
BroodmareBroodmare
Complete FeedComplete Feed
NutritionNutrition
PerformancePerformance
Omolene Progression 200 is a textured feed intended for performance horses, growing horses and gestating mares. It supplies 14% protein, 7% fat and 10% fiber.

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