Magnesium tetany is most commonly found in which group of animals?

Magnesium tetany, also known as grass tetany, is primarily associated with lactating cows. This condition occurs due to low levels of magnesium in the blood, which is particularly a concern for cows that are in lactation and have high nutritional demands. During lactation, cows require significant amounts of magnesium to support milk production and are at a greater risk for developing deficiencies, especially when grazing on certain types of pastures that may be low in this essential mineral, particularly those high in potassium and nitrogen.

In contrast, while young calves and adult bulls can experience health issues related to mineral deficiencies, they are not as susceptible to magnesium tetany as lactating cows. Goats will generally not display this condition at the same rates as lactating cows, as their metabolic requirements differ. Therefore, the association of magnesium tetany with lactating cows makes this answer the most accurate in the context of veterinary concerns.