Hypocalcemia is a disorder in dairy cows caused by lower than normal blood calcium concentrations. There are two forms of the disorder, clinical and subclinical. Clinical hypocalcemia, more commonly referred to as clinical milk fever (MF), is defined as a cow having a total blood calcium concentration below 5.5 mg/dl and showing physical signs of the disorder (muscle tremors, drop in body temperature, laterally recumbent). Subclinical hypocalcemia (SCH) is defined by a total blood calcium concentration ranging from 5.6 to 8.5 mg/dl and showing no physical signs of the disorder.