The preweaning performance of 221 steer and heifer calves given differing numbers of Ralgro implants was evaluated. The steer and heifer calves given one implant had an additional 23 and 33 lb weaning weight compared to those receiving no implant. No additional response was shown by steer calves receiving a second implant 100 days after the first was given. Average daily gains during the 105-day growing period were not significantly faster than those receiving two implants during the 103-day finishing phase.
This work supports other studies indicating that implanting calves at weaning time is an economical management practice. The work further indicates to feeders that calfhood implants have little or no effect on subsequent performance in the feedlot.
Number of Pages
Department of Animal Science, Agricultural Experiment Station, South Dakota State University
Whittington, D. L.; Kuhl, G.; and Dittman, A., "Preweaning and Postweaning Performance of Crossbred Calves--0, 1 or 2 Ralgro Implants" (1982). South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1982. 7.