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Microbial-based Additives - Feed Ingredient

Microbial-based additives include live microorganisms such as yeasts (Saccharomyces cerevisiae) and bacteria (Lactobacillus, Bifidobacterium, Enterococcus), as well as their derivatives like bacterial or yeast extracts and fermentation products. These additives are used in equine feeds to support gut microbial balance, improve fiber digestion, and enhance nutrient utilization.
Extracts and postbiotics may include cell wall components (e.g., beta-glucans, mannan-oligosaccharides) or fermentation metabolites that influence gut function and immunity. Enzymes produced through microbial fermentation, such as cellulase or xylanase, may also be included to assist in the breakdown of fibrous feed components.

The following equine feeds, supplements and products contain Microbial-based Additives 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.
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.
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 supplement to be used for horses with gastric health concerns. It is designed to maintain stomach and hindgut health and to support the immune system.
Mare & Foal (Kelley’s Feed)
BroodmareBroodmare
FoalFoal
GrowthGrowth
NutritionNutrition
Mare & Foal by Kelley's Feed is a supplemental feed intended for growing, gestating, and lactating horses. It is a barley-based feed that contains at least 16% protein, added vitamins, and a blend of organic and inorganic minerals.
Mare & Foal (Matrix)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Mare & Foal by Matrix is a pelleted complete feed formulated for broodmares and growing foals. It provides a high level of protein (16%) and moderate fat (5%) to meet the demands of gestation and growth.
Mare & Foal (Running Horse Elite Equine Nutrition)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Running Horse Elite Mare & Foal is a high-fat feed that contains 16% protein and 9% fat from sources such as wheat middlings, rice bran, and soybean oil. This feed is targeted at pregnant, lactating, and growing horses.
Mare & Foal (Seminole)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Seminole Mare & Foal™ is a textured feed designed for foals, weanlings, and late-gestation or lactating broodmares. This oat-based feed contains corn, digestible fibre, added lysine, and chelated trace minerals.
Mare Cube (Excel Equine Feeds)
BroodmareBroodmare
GrowthGrowth
NutrientsNutrients
NutritionNutrition
Mare Cube by Excel Equine Feeds is a cubed feed fortified with protein, amino acids, vitamins and minerals. It is intended for broodmares and growing horses.
Mare Foal & Youngstock (NAF Equine)
BroodmareBroodmare
FoalFoal
GrowthGrowth
Mineral BalanceMineral Balance
Mare Foal & Youngstock from NAF Equine is intended for broodmares, foals, and growing horses. This supplement is intended to provide adequate vitamins and minerals to support growth.
Mare Mineral (Dunstan)
BroodmareBroodmare
ImmunityImmunity
Mineral BalanceMineral Balance
NutritionNutrition
Mare Mineral by Dunstan is a pelleted feed containing vitamins and minerals. It is intended for pregnant mares.
Mare Prepare (Bluegrass Horse Feed)
BroodmareBroodmare
Complete FeedComplete Feed
NutrientsNutrients
StallionStallion
Mare Prepare from Bluegrass Horse Feed is a feed meant for broodmares or stallions. This feed aims to assist in fertility, breeding performance and recovery from reproduction.
Mare-Foal II-P (Pellets) (MVP)
BroodmareBroodmare
FoalFoal
Mineral BalanceMineral Balance
VitaminsVitamins
Mare-Foal II-P by MVP is a pelleted supplement designed for broodmares and foals. It contains vitamins, minerals, probiotics and an elevated protein level that intend to support proper development.
MareKare (AniMed)
BroodmareBroodmare
LactationLactation
NutrientsNutrients
VitaminsVitamins
MareKare from AniMed is a made for pregnant and lactating mares. This vitamin and mineral supplement is meant to provide extra nutrients and help maintain body condition during breeding, foaling, and lactating.
Mash & Mix (Cavalor)
Competition HorsesCompetition Horses
DigestionDigestion
ElectrolyteElectrolyte
RecoveryRecovery
Cavalor Mash & Mix is a wheat bran and linseed-based feed intended for horses after heavy work or during times of stress. It is a high-energy feed with 37% NSC (32.5% starch, 4.5% sugars) and 7% crude fat.
Mass-No-Sass (Daily Dose Equine)
DigestionDigestion
FiberFiber
ForageForage
Weight IssuesWeight Issues
Mass-No-Sass by Daily Dose Equine is a hay-based feed with high fat and fibre. It is intended to be digested in the foregut, allowing a horse to maintain focus and calm during training.
Master’s Hoof Blend (Vita Flex)
Amino AcidAmino Acid
Hoof HealthHoof Health
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Master's Hoof Blend from Vita Flex is a hoof supplement containing the essential amino acids lysine and methionine, and biotin. It also contains sulfur and chelated trace minerals to support hoof growth and integrity.
Materna (Sollio Agriculture)
GrowthGrowth
HealthHealth
MareMare
NutritionNutrition
Materna is a pelleted feed intended for broodmares during lactation and gestation. This feed is intended to promote the development of the fetus. Materna contains 16% crude protein.
Mature Horse (Bar Ale)
Complete FeedComplete Feed
JointsJoints
NutritionNutrition
SeniorSenior
Mature Horse is intended to support overall health and nutrient requirements for an adult to a senior horse. It contains glucosamine which is meant to support joint health.
Mature Horse Pellet (Matrix)
Complete FeedComplete Feed
HealthHealth
NutritionNutrition
SeniorSenior
Mature Horse Pellet by Matrix is a complete pelleted feed intended for mature horses that provides 14% protein and 4.5% fat. It contains energy sources such as barley, alfalfa meal, and wheat.
Mature Horse Pellets (Lifeline)
FiberFiber
Gut HealthGut Health
SeniorSenior
Weight IssuesWeight Issues
Mature Horse Pellets by Lifeline is a pelleted feed intended for horses with weight control issues.
Mature Horse Textured (Matrix)
Complete FeedComplete Feed
NutritionNutrition
ProteinProtein
SeniorSenior
Mature Horse Textured by Matrix is a texturized complete feed that provides 14% protein and 4.5% fat. This feed is recommended for mature horses in moderate to heavy work to supply additional energy and protein.
Mature Horse Textured Feed (Lifeline)
DigestionDigestion
FiberFiber
Gut HealthGut Health
SeniorSenior
Lifeline Mature Horse Textured Feed is a feed intended for horses with weight issues, and horses in light to moderate work.
Maxi Tub A/N (Agassiz Feeds)
HealthHealth
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Maxi Tub by Agassiz Feeds is a protein, energy, mineral and vitamin lick designed for beef cattle and dairy heifers on pasture. It is molasses-based, with no additional salt, providing a minimum of 16% crude protein.
Maxim Low-GI (Dunstan)
FiberFiber
HealthHealth
Low NSC FeedsLow NSC Feeds
NutritionNutrition
Maxim Low-GI by Dunstan is a high fibre feed formulated to be low in starch and sugar. It is intended for horses that do not do well on grain-based feeds.
Medicine Bag Complete (Stance Equine USA)
GrowthGrowth
HealthHealth
Mineral BalanceMineral Balance
MuscleMuscle
Medicine Bag Complete by Stance Equine is a powdered mineral supplement intended for all types of horses.
Mega Dose (Horse Guard)
DigestionDigestion
Gut HealthGut Health
Mineral BalanceMineral Balance
VitaminsVitamins
Mega Dose by Horse Guard is a supplement that contains vitamins, minerals, and probiotics. It is intended to assist with digestion, gut health and hoof health.
Mega-Cell MVP – Pelleted Multi Vitamin and Mineral (Med-Vet)
HealthHealth
ProbioticProbiotic
Ration BalancerRation Balancer
VitaminsVitamins
MVP Mega-Cell is a pelleted vitamin and mineral supplement for horses formulated to balance grass hays and grain-based diets. It is also a source of amino acids and microbials.
Mega-Mag (Pellets) (MVP)
Amino AcidAmino Acid
Mineral BalanceMineral Balance
ProbioticProbiotic
VitaminsVitamins
Mega-Mag by MVP is a pelleted supplement designed for alfalfa hay/grain diets that provide vitamins, minerals, amino acids, and probiotics intended horses of all life stages.
Meganutril Ultra (Equina USA)
AntioxidantAntioxidant
HealthHealth
ImmunityImmunity
VitaminsVitamins
Meganutril Ultra from Equina USA is a mineral supplement for horses. Meganutril Ultra contains vitamins, amino acids, and yeast. This supplement is intended to balance nutritional deficiencies in horses.
Mellow Muscle (Sierra Gold)
CalmingCalming
Mineral BalanceMineral Balance
MuscleMuscle
VitaminsVitamins
Mellow Muscle by Sierra Gold is a powdered supplement for horses intended to aid horses suffering from PSSM. It contains vitamins, minerals, and amino acids which intend to support muscle growth.
Meta Safe (Hygain)
ImmunityImmunity
MetabolismMetabolism
Ration BalancerRation Balancer
Weight IssuesWeight Issues
Meta Safe from Hygain is a ration balancer pellet for horses. Meta Safe is intended for horses on a restricted diet or suffering from metabolic issues. This feed contains 6.5% NSC.
Meta-Librium (Equi-Force)
CalmingCalming
Metabolic SyndromeMetabolic Syndrome
Mineral BalanceMineral Balance
VitaminsVitamins
Meta-Librium is a supplement intended to help manage metabolic syndrome and insulin resistance in horses and ponies. It contains magnesium, lipoic acid, vitamin E and C, and L-Carnitine, enhancing insulin action.
Meta-Support (Basic Equine Nutrition)
Metabolic SyndromeMetabolic Syndrome
Mineral BalanceMineral Balance
MuscleMuscle
Weight IssuesWeight Issues
MetaSupport is formulated with several key nutrients to support metabolic health. It contains chromium yeast and magnesium oxide, which are thought to promote insulin secretion and sensitivity.
Metaboleeze (Kentucky Performance Products)
MetabolismMetabolism
MuscleMuscle
Organic Trace MineralsOrganic Trace Minerals
VitaminsVitamins
Metaboleeze by Kentucky Performance Products is a premix supplement intended to support normal insulin regulation and healthy muscle metabolism. It contains a source of chromium combined with B-complex vitamins and minerals.
Metabolic Miracle (Aterak Nutrition)
Grain FreeGrain Free
Metabolic SyndromeMetabolic Syndrome
Mineral BalanceMineral Balance
VitaminsVitamins
Metabolic Miracle by Aterak Nutrition is a feed targeted toward horses or ponies with metabolic disorders (Cushing's, Founder, Laminitis). This feed contains the vitamins and minerals necessary to support a well-balanced diet and is high in fibre.
Metaslim (Simple System Horse Feeds)
IngredientIngredient
Metabolic SyndromeMetabolic Syndrome
NutrientsNutrients
Weight IssuesWeight Issues
Metaslim is a pelleted equine feed designed for horses who have metabolic issues. It is a highly palatable feed suitable for overweight horses.
Micro-Max (Kentucky Equine Research)
Gut HealthGut Health
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
KER Micro-Max is a vitamin/mineral supplement intended for horses on high-forage diets. It contains macro- and micro-minerals, and vitamins A, D and E.
Micro-Phase (Kentucky Performance Products)
AntioxidantAntioxidant
Mineral BalanceMineral Balance
NutritionNutrition
VitaminsVitamins
Kentucky Performance Products Micro-Phase is a vitamin and trace mineral supplement designed for horses on forage-only diets or those fed concentrate feeds below the recommended feeding rate. It is an alfalfa-based pelleted supplement containing a mix of organic and inorganic minerals.
Microbiome Support (Dynavyte)
DigestionDigestion
Gut HealthGut Health
PrebioticPrebiotic
ProbioticProbiotic
Microbiome Support by Dynavyte is a probiotic supplement intended to support gut health in horses.
Microfeed (Dodson & Horrell)
Amino AcidAmino Acid
ExerciseExercise
Mineral BalanceMineral Balance
Organic Trace MineralsOrganic Trace Minerals
Microfeed is a feed designed for racehorses in full training. This feed is high in NSC to give the horses an energy boost. It is also high in protein for proper muscle building and includes some yeast for good digestive function.
MicroVital (St.Hippolyt)
HealthHealth
Organic Trace MineralsOrganic Trace Minerals
StressStress
VitaminsVitamins
MicroVital by St.Hippolyt is a pelleted supplement intended to support horses deficient in trace minerals and vitamins.
Milestone Compete Horse Food (Muenster)
Coat QualityCoat Quality
Competition HorsesCompetition Horses
FatFat
MuscleMuscle
Complete Horse Food is intended to promote muscle growth and function. It is ideal for performance horses and breeding stock as extra calories and energy are needed.
Milestone Foal Horse Food (Muenster)
FiberFiber
FoalFoal
GrowthGrowth
ProteinProtein
Foal Horse Food is intended for horses and ponies under the age of 1. The diet includes nutrients needed for normal growth and development.
Milestone Life Horse Food (Muenster)
Caloric EnergyCaloric Energy
FiberFiber
GrainsGrains
Hay StretcherHay Stretcher
Life Horse Food is designed to be a hay replacer and provide nutrients to horses and ponies of all ages. It is ideal for horses that are in moderate work.
Milestone Life Plus Horse Food (Muenster)
FatFat
FiberFiber
GrainsGrains
Omega 3-6-9Omega 3-6-9
Life Plus is a pelleted feed intended to provide additional energy and nutrients to all horses and ponies. It is also suitable for performance horse and breeding horses as they need extra essential nutrients.
Milestone Optimize Horse Supplement (Muenster)
FatFat
NutritionNutrition
Omega 3-6-9Omega 3-6-9
Weight IssuesWeight Issues
Optimize Horse Supplement is a high-fat feed intended to provide more energy to breeding horses and performance horses. It contains nutrient dense ingredients such as coconut meal and flaxseed.
Milestone Senior Horse Food (Muenster)
FatFat
FiberFiber
MareMare
SeniorSenior
Milestone Senior Horse Food is a pelleted feed intended for older horses in light to moderate work. It is suitable as a supplemental feed when forage availability is limited. It contains high fiber, low starch, alfalfa, coconut, flax, and algae meal.
Milk & Grow Pellets (Uckele)
BroodmareBroodmare
FoalFoal
GrowthGrowth
LactationLactation
Milk & Grow Pellets is a vitamin, mineral, probiotic, and amino acid pelleted supplement formulated for lactating and gestating mares as well as growing foals that have increased nutrient demands.
Min-A-Vite (Blue Seal) [DISCONTINUED]
HealthHealth
Mineral BalanceMineral Balance
NutrientsNutrients
VitaminsVitamins
Min-A-Vite from Blue Seal is a vitamin and mineral supplement intended for horses and ponies of all ages and work levels. Min-A-Vite uses a mix of inorganic and organic trace minerals.
Mineral & Vitamin Formulation (Wild Gold)
Organic Trace MineralsOrganic Trace Minerals
ProbioticProbiotic
Ration BalancerRation Balancer
Toxin BinderToxin Binder
Wild Gold Mineral and Vitamin Formulation is an equine supplement containing probiotics, prebiotics, zeolite clay, salt, trace minerals, and vitamins, including biotin
Molasses Flavor Horse Treats (Agrimaster)
EnergyEnergy
FlavorFlavor
NutrientsNutrients
VitaminsVitamins
Molasses Flavor Horse Treats by Agrimaster is a horse treat formulated with added minerals and vitamins A and E, and is intended for all classes of horses.
Mollichaff Condition Complete (HorseHage)
Complete FeedComplete Feed
Competition HorsesCompetition Horses
Weight IssuesWeight Issues
YeastYeast
Mollichaff Condition Complete from HorseHage contains a blend of alfalfa, oat straw, fiber pellets, barley, soya flakes, soya oil, and mint. This feed is ideal for performance horses and overweight or underweight horses.
MoorGLO (ADM Animal Nutrition)
FatFat
FiberFiber
Gut HealthGut Health
Weight IssuesWeight Issues
ADM MoorGLO is a high-fat feed formulated for exercising horses and those that need to gain body condition. It is designed to be a palatable energy source with rice bran, flaxseed and vegetable oil.

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