Bran benefits

Bran, often in the form of bran mash, has long been fed to horses as a source of fibre or laxative to help prevent colic, as a warm and palatable feed for sick horses or those with poor teeth and after a hard days hunting. However, should these feeding practices be considered as words from the wise or an outdated tradition?

One of the biggest problems associated with feeding bran is its very high phosphorus content. The ratio of calcium to phosphorus in the horse’s diet should be ideally maintained at 1.5-2:1 (1.5-2 times more calcium than phosphorus) but in comparison, bran contains 10-12 times more phosphorous than calcium. High levels of phosphorus decrease calcium absorption, resulting in deficiency. Consequently, calcium is drawn from bones (where 99% of calcium is stored) which in serious cases, causes them to weaken. Although far less common now, feeding large amounts of bran and consequently high levels of phosphorus, can result in ‘Millers Disease’ (Nutritional Secondary Hyperparathyroidism); a condition which eventually results thickening and distortion of bones caused  by lost minerals being replaced with fibrous tissue.

Feeding small amounts of bran on an infrequent basis will not cause major mineral imbalances, but as we all seem to appreciate that new feeds should be introduced gradually, why make an exception for bran? In fact, some researchers believe that this could have a negative effect on the hindgut microbes responsible for fibre digestion. Research has also shown than bran does not act as laxative, regardless of whether it is fed wet or dry. Instead, any ‘laxative effect’ is likely to be the caused by the mild disturbance or irritation resulting from the sudden introduction of a new feed.

For people, fibre (including bran) can increase the bulk of stools by helping them to retain more water and consequently make them easier to pass. However, fibre requirements in horses are much higher and whilst bran does contain fibre, the content is much lower (10-12%) than in sugar beet (20% - unmolassed) and hay.  In fact even as a source of water, the benefits of a bran mash may be questionable when you consider the small amount of water actually consumed in comparison to the horse’s daily requirements.

Many of us reach for a mug of hot chocolate or soup in colder weather and whilst a feeding a warm bran mash may be a comforting thought, it will not continue to keep your horse warm after he has eaten it.  As a result of fermentation in the large intestine, the digestion of hay and other forages produces heat (regardless of the weather) and therefore nutritionally, feeding additional hay is more likely to help keep your horse warm.

Whilst feeding bran will not always result in serious harm, particularly if properly balanced and fed in small amounts to adult horses; reported benefits are based largely on tradition. Consider whether adding bran to your horse’s diet is really necessary as unfortunately, it is one feeding tradition that may potentially cause more harm than good.

Electrolytes: What are they and does your horse need them?

Electrolytes are mineral salts which, when dissolved in water, become electrically charged particles called ions. However, whilst scientifically accurate, this explanation offers little help to many horse owners when it comes assessing their horse’s need for electrolytes.

When horses sweat they lose electrolytes, the main ones being sodium, potassium, chloride, calcium and magnesium (although calcium and magnesium are lost in smaller amounts). Sweating rates can be as high as 10-15 litres of sweat per hour, with electrolyte losses of approximately 10g/ litre.  Electrolytes are important for many cell functions including muscle contractions and the transmission of nerve impulses. A lack or imbalance of electrolytes can affect almost every physiological system in the horse's body and result in conditions such as heat stress, fatigue, synchronous diaphragmatic flutter (thumps) and tying up. Electrolytes control the direction of water in the body and maintain fluid balance. The body needs electrolytes to retain water which is why you may have read that it is more difficult to rehydrate by drinking water alone.

However, the amount of electrolytes lost is proportionate to the amount the horse sweats and consequently, free access to a salt lick and plenty of forage (hay provides potassium) is more than sufficient for many leisure horses and those in light work. In fact, most losses would gradually be replaced over time, simply by the horse eating and drinking normally. However for horses sweating heavily and on a on a regular basis, a water and electrolyte solution will aid a more rapid and effective recovery.  Regardless of this, it is not possible to replace total losses in one feed/ solution. Such supplements aim to support hydration and the replenishment of electrolytes but in fact, it will take several days for levels to be fully restored following heavy and prolonged sweating. Whilst it is not possible to ‘preload’ electrolytes, maintaining hydration and electrolyte balancer prior to exercise/ competition is an important precaution, helping to reduce the risk of conditions such as tying up.

Table salt (sodium chloride) and in heavier work a combination of table salt and Lo Salt (potassium chloride and sodium chloride at a 2:1 ratio), can be a cheap and effective form of electrolyte replacement, either added to horses feed or diluted in water. Water must be available if adding salt directly to the feed and must also be offered as alternative to horses that refuse to drink the salt and water solution (this is also the case if using commercial supplements). Apple juice has been recommended by many as an effective flavouring but horses should be ‘taught’ or accustomed to drink the flavoured water before salts are added.

Although more expensive, commercial electrolyte supplements can be beneficial, despite speculations that some contain little more than sugar.  Whilst we now know that horses do not need high levels of sugar in order to absorb electrolytes, ingredients such as dextrose and sucrose are often still included to help make supplements palatable and provided that they also contain appropriate levels of electrolytes, this is not a problem. Look for supplements containing sodium, potassium, chloride and ideally magnesium and calcium too. Sodium and potassium should feature near the top of the list of ingredients, with sodium provided in the largest quantity. For competition horses, also take care to ensure that any supplement used does not contravene FEI rules and is covered under the UFAS BETA NOPS code.

Electrolytes are undoubtedly important, but it is easy for such a scientifically complex subject to cause confusion. If you think your horse may need additional electrolytes, ask a nutritionist for advice on adding salt to his feed, or look for a supplement manufactured by a reputable company. Such companies should have a nutritionist available to clearly explain the benefits of their product, what’s in it and how to use it safely.