The study looked at how young horses process calcium in their bodies when given diets with different levels of this mineral. They used 12 male horses, around 12 months old, and fed them diets with low, medium, or high calcium levels. By injecting a special form of calcium into the horses and collecting blood, urine, and feces samples, they found that the horses absorbed calcium equally well regardless of the diet's calcium level. The amount of calcium in the blood, urine, and feces did not change much with different calcium levels in the diet. The researchers also found that the more calcium in the diet, the more calcium the horses absorbed and retained in their bodies.