Which mineral feed is suitable for horses?

---

Excellent Electrolyte Pellets for Horses

At our store, I am constantly asked whether a horse really needs mineral feed or whether hay and pasture access are already sufficient. The honest answer depends on the horse: its level of use, its age and how much it actually sweats.

Many horse owners turn to mineral feed after noticing a dull coat or brittle hooves, without knowing exactly which nutrient is actually missing. Others simply provide it as a precaution, without knowing their horse's actual requirements.

Below, I explain which mineral feed is suitable for which type of horse, how to recognize a deficiency and when traditional mineral feed alone is no longer enough because additional electrolytes are needed.

• A basic mineral feed covers calcium, phosphorus, magnesium and trace elements, but only electrolytes can compensate for actual sweat losses of sodium, potassium and chloride.
• Requirements clearly differ according to type of use: leisure horses need a standard mineral feed, while foals, pregnant mares and sport horses require higher or different amounts.
• Neither hay nor pasture guarantees an adequate supply; soil quality, the season and changes in feed constantly alter the mineral composition.
• Signs of deficiency vary: a dull coat and brittle hooves point to a lack of trace elements, while muscle tremors during exertion are more likely to indicate an electrolyte or magnesium deficiency.
• Mineral feed should be included in the feeding plan daily in a fixed amount, whereas electrolytes should be given selectively and only on days when the horse sweats heavily.

What is mineral feed, and why does my horse need it?

Mineral feed supplements macrominerals such as calcium, phosphorus and magnesium, as well as trace elements such as zinc, copper and selenium, which a horse often does not obtain in sufficient quantities from its basic feed. These substances are also found in hay and pasture grass, but usually in incomplete amounts or in the wrong proportions.

In particular, the calcium-to-phosphorus ratio can easily become unbalanced on an all-hay diet, because hay often provides too much phosphorus and too little calcium. Over time, an imbalanced ratio can affect bone metabolism, even if the horse appears fit at first glance.

Mineral supplements therefore differ clearly from vitamin supplements. While vitamin preparations often target coat shine or the immune system, minerals are primarily important for bone density, muscle function, and a stable metabolism.

A basic mineral supplement covers this daily basic requirement, regardless of how much the horse is currently working or what season it is. It is the basic foundation that can later be expanded depending on the horse’s use and workload.

Which mineral supplement is right for my horse depending on its use?

The right choice of mineral supplement depends mainly on how much your horse works and which stage of life it is in. A leisure horse in light work, such as occasional trail rides or a few hours of exercise per week, will generally manage with a standard mineral supplement without high additional doses.

The situation is different for sport horses undergoing regular intensive training. They lose significantly more minerals through sweat and need a higher daily intake, often supplemented with targeted electrolyte administration in addition to their basic feed.

Foals and pregnant or nursing mares have increased requirements for calcium and phosphorus because both substances are needed for bone growth and milk production. In these cases, it is worth adjusting the ration more precisely to these two macrominerals instead of continuing to feed a general mineral supplement for adult horses.

Seniors, in turn, often absorb nutrients through the intestines less effectively than younger horses. They frequently benefit from more easily digestible mineral sources that are reliably absorbed despite declining digestive function.

When are hay and pasture no longer sufficient?

Hay from soils low in minerals often provides too little copper, zinc, and selenium to meet a horse’s daily requirements. How much of these minerals the hay contains depends heavily on the soil of the growing area, and this cannot be determined with the naked eye.

Keeping horses exclusively on pasture in summer is also no guarantee of a balanced supply. Fresh grass often contains a lot of potassium but comparatively little sodium, which can lead to an excess of potassium combined with a sodium deficiency.

For horses in intensive work or sweating heavily in summer, a basic ration consisting solely of hay and pasture is usually no longer sufficient anyway. Their needs exceed what forage alone can provide, regardless of how good the pasture otherwise is.

Another point that many overlook: Even changing the feed source, such as using new hay from a different region or field, noticeably changes the mineral composition of the ration. What worked last winter does not necessarily remain appropriate with new hay.

Excellent Horse Electrolyte Powder 1 kg

How can I recognize a mineral deficiency in my horse?

A dull coat, brittle hooves, and delayed shedding are often the first visible signs of a deficiency in zinc, copper, or biotin. With my own horses, I pay particular attention in spring to how quickly the winter coat comes out, as this provides a good indication.

Muscle tremors, muscle cramps, or unusually rapid fatigue after work, on the other hand, more often indicate an electrolyte or magnesium deficiency than a pure trace-element deficiency. These symptoms usually appear only under exertion, not at rest, which is why they are more noticeable during training than when leading a horse in the pasture.

If a deficiency persists for a longer period, it affects bone density and tendon stability. This can have long-term consequences, particularly in young horses that are still growing, which may later be difficult to correct.

If symptoms persist or remain unclear, I would not recommend guessing and simply adding more feed. In such cases, I recommend seeking veterinary advice and having the ration specifically assessed, as described for horse owners in the Merck Veterinary Manual.

What role do electrolytes play in mineral balance?

Electrolytes such as sodium, potassium, and chloride are lost through sweating and are often inadequately covered by traditional mineral feed because they are needed in an entirely different quantity than the usual trace elements. A sweating horse loses these substances within just a few hours, while mineral feed is designed to provide a slow, consistent basic supply throughout the day.

For rapid absorption and retention of moisture, we offer Excellent Horse Electrolyte Powder 1 kg, which is suitable for individual horses, and for larger stables or longer competition series, Excellent Horse Electrolyte Powder 2.5 kg as a more practical pack size. If you are looking for a pre-portioned alternative, the Excellent Electrolyte Pellets for Horses offer a form that mixes well with concentrated feed without needing to be measured out separately.

Electrolytes do not replace a complete mineral feed. They specifically supplement it on days with heavy sweating due to work, transport, or heat, not as a permanent part of the daily basic ration.

The three Excellent electrolyte products compared

How do I dose and feed mineral supplements correctly?

The correct dosage of mineral feed always depends on the horse’s weight, the forage and the intensity of work. The manufacturer’s dosage recommendation on the packaging is the starting point—not guesswork when filling the measuring cup.

I feed mineral supplements every day in a consistent amount, regardless of whether the horse has been worked that day. The basic requirement for calcium, phosphorus and trace elements continues on rest days, after all.

I treat electrolyte powder or pellets differently: I administer them specifically on training or competition days when the horse is visibly sweating, rather than adding them continuously. This keeps intake linked to actual requirements instead of simply giving the same amount every day.

A sudden change in the ration, whether switching mineral feed or introducing electrolytes, should always be made gradually over several days. A horse’s gut flora is sensitive to abrupt changes, and a slow adjustment significantly reduces the risk of digestive problems.

Mineral requirements by type of use at a glance

Basic mineral feed or additional electrolytes: which ration is right for your horse now?

For a leisure horse in light work, a solid basic mineral feed that reliably covers calcium, phosphorus, and magnesium is sufficient. If your horse sweats regularly, whether during sport, in summer, or during transport, I would specifically add electrolytes such as Excellent Horse Electrolytes Powder 1 kg to the ration, because mineral feed alone does not replace the sodium and potassium lost through sweat.

The point at which this decision changes is your horse's training condition: if the workload increases or hot days become more frequent, occasional electrolyte supplementation quickly becomes a regular part of the week. If sweat loss remains low, the basic mineral feed is still sufficient.

If your horse continues to show a dull coat, brittle hooves, or muscle tremors despite an adjusted ration, the feeding plan should be reviewed by a veterinarian rather than trying additional supplements on your own.

Before making your next feeding decision, this short check is worthwhile:

• Check the basic feed: do hay and pasture already provide most of the major minerals, or is a basic mineral feed needed?
• Determine the horse's use type: leisure, sport, breeding, or senior status directly affects its daily mineral requirements.
• Assess sweat loss: during intensive training or hot weather, also plan for electrolytes such as Excellent Horse Electrolytes Powder 1 kg.
• Determine the dosage according to the manufacturer's instructions and body weight, not by guesswork.
• Regularly monitor coat changes, hoof quality, and willingness to perform to detect a deficiency early.
• For larger herds or multiple sport horses, switch to Excellent Horse Electrolytes Powder 2.5 kg as a more practical package size.
• Always make changes to the ration gradually to avoid straining digestion.
• Seek veterinary advice in the event of unclear or persistent deficiency symptoms.