Six warm-blooded horses in the age of 6 till 16, were researched. The horses were divided into two groups: experimental and testing (each per 3 horses). In the first stage the trial was taken up to estimate the grade (rank) of sand accumulation in the alimentary canal of all horses with using the floatation test. In the second stage the experimental group with the given foragegot the supplement of Plantago Psyllium seeds in the amount of 210 g per horse per day during 7 days. The researches revealed that preventive supplement of Plantago Psyllium seeds three times increases the amount of sand excreted from the alimentary canal. So using the supplement of Plantago Psyllium seeds can prevent the excessive of sand concentration in horses alimentary canal and this way decreases the risk of occurring the intestinal colic diseases – in the matter.

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