08/13/2025
๐๐ฅ๐จ๐๐ค ๐๐๐ฅ๐ญ ๐จ๐ซ ๐๐จ๐จ๐ฌ๐ ๐๐๐ฅ๐ญ - ๐๐ก๐ข๐๐ก ๐จ๐ง๐ ๐ข๐ฌ ๐๐๐ญ๐ญ๐๐ซ ๐๐จ๐ซ ๐ฒ๐จ๐ฎ๐ซ ๐ก๐จ๐ซ๐ฌ๐?๐ด ๐
Thereโs a widespread belief that horses should be fed loose salt instead of block salt, based on the idea that they can consume loose salt more easily. This belief stems from the fact that salt blocks were originally designed for cattle, who have rougher tongues and can more effectively lick salt from a block.
๐๐ฎ๐ญ ๐ข๐ฌ ๐ญ๐ก๐ข๐ฌ ๐๐จ๐ง๐๐๐ซ๐ง ๐ญ๐ซ๐ฎ๐ฅ๐ฒ ๐ฌ๐ฎ๐ฉ๐ฉ๐จ๐ซ๐ญ๐๐ ๐๐ฒ ๐ซ๐๐ฌ๐๐๐ซ๐๐ก?
At the 2025 Equine Science Society Symposium in June, my friend and colleague, Dr. Devan Catalano of Colorado State University, presented new findings that aimed to answer this very question.
๐งช ๐๐๐ญ๐๐ซ๐ข๐๐ฅ๐ฌ ๐๐ง๐ ๐๐๐ญ๐ก๐จ๐๐ฌ
Sixteen mature horses were individually housed and assigned to one of two treatments:
๐น Loose salt
๐น Block salt
Each horse remained on one treatment for seven days before switching to the other in a crossover design. The entire study was repeated so that each horse received both treatments twice. Salt consumption was measured by weighing the salt before and after each seven-day period.
๐ ๐๐๐ฌ๐ฎ๐ฅ๐ญ๐ฌ
The form of salt (loose vs. block) did not significantly impact overall intake. However, individual variability played a major role in which some horses consumed more salt than others, regardless of the form offered. This highlights the wide range of intrinsic motivation among horses to seek out and consume salt.
๐ก Interestingly, only 7 of the 16 horses met the recommended daily salt intake of 30 grams per day, suggesting that many horses may not self-regulate adequately when left with free-choice salt alone.
๐ญ ๐๐ข๐ฌ๐๐ฎ๐ฌ๐ฌ๐ข๐จ๐ง
These findings suggest that free-choice salt access, whether loose or in a block, may not be sufficient to meet the daily salt needs of many horses. If youโre concerned about intake, top-dressing salt onto feed can help ensure your horse gets enough, but keep in mind this can sometimes reduce palatability of the meal.
๐ฃ ๐๐๐ค๐-๐๐จ๐ฆ๐ ๐๐๐ฌ๐ฌ๐๐ ๐
Free choice access to loose salt isnโt necessarily better than a block, but neither may be enough on its own. Monitor your horseโs intake and consider top-dressing if needed to meet their daily requirements.
Cheers,
Dr. DeBoer
Murphy BA, Catalano D. Effect of form on equine salt intake. Journal of Equine Veterinary Science. 2025 May 1;148:105502.