01/05/2026
WORKING HORSES NEED ADDED SALT!
Lately I've had a bunch of questions come in about salt and electrolytes.
Working horses can lose significant amounts of electrolyte salts in their sweat, especially in warm weather.
The main electrolyte salts lost in sweat are sodium, potassium and chloride.
Potassium is oversupplied by most horse diets (from forage), whereas sodium and chloride are often undersupplied.
Firstly, what's the difference between 'salt' and 'electrolytes', when salt is an electrolyte??!!
Salt is a term we usually use to describe sodium chloride, although by definition it can include any mineral salt including potassium chloride.
Electrolyte is a term used to describe the salts involved in body fluid balance.
We need to replace sodium and chloride for horses in light to moderate work, and then also potassium for horses in heavy work or prolonged exercise, especially in hot and or humid weather (when sweat losses will be higher).
You can feed plain salt (sodium chloride) as your electrolyte for light to moderate work, and then a half and half mix of regular salt and lite- or lo-salt (which is a mix of sodium chloride and potassium chloride) for heavier work (to supply both sodium and potassium, as well as chloride).
Or you might choose to buy a commercial electrolyte instead, but if you do, check it actually provides enough sodium (not all do)!
Some commercial electrolytes are mostly sugar (also called dextrose) and don't contain enough sodium to replace sweat losses.
Always check there is enough sodium in your chosen electrolyte product if you are using it to replace sodium lost in sweat (as opposed to rehydration).
Aim for at least 20g of sodium chloride (common salt) (about 8g actual sodium) daily for light work up to 60g (about 24g sodium) for hard work.
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