The primary role of Cr appears to relate to its ability to enhance the action of insulin. Requirements for Cr in dairy cattle have not been defined . However, stud- ies have indicated that Cr supplementation may affect health and immune response in stressed calves. Several other reports also indicate that Cr supplementation can significantly affect feed intake and milk production in early lactation dairy cows . In these studies Cr was supplemented from 21 to 28 days prepartum until 28 to 35 days postpartum.