Ketosis occurs in dairy cows as a consequence of the negative energy balance in the early postpartum period, and can result in
lowered milk production, impaired fertility, and increased risk of periparturient diseases, such as displaced abomasum. Subclinical
ketosis usually precedes clinical ketosis, and is much more common. Estimates suggest a median herd incidence of 40% with a range
of 8 to 65%. Subclinical ketosis causes greater economic losses on a herd basis than clinical ketosis. Subclinical ketosis can be
diagnosed by measuring ketone bodies present in blood, urine, or milk The Ketotestâ„¢ (Ketolac test strip) is a convenient, very
effective method of detecting cows with subclinical ketosis.1,2