TY - RPRT TI - Pilot study to evaluate the effect of a calcium and vitamin D-containing oral bolus on serum calcium levels in early lactation Holstein dairy cows AU - Shock, D. A. AU - Renaud, D. L. AU - Roche, S. M. AU - Genore, R. L. AU - Reynen, R. AU - Olson, M. E. PY - 2019 DO - 10.1101/520221 UR - https://www.biorxiv.org/content/10.1101/520221v1 ID - 10.1101/520221 ER -