One can expect animal performance to be depressed if cattle are fed beyond the active duration of the final implant. Implants increase animal and carcass weight. Use moderation in your implant program if your cattle are already borderline for maximum industry standards for animal and carcass weight. Occasionally, there is over-use of implants. Estrogenic compounds can increase riding and prolapses.
Androgenic compounds can increase the number of dark cutters.
CC-Type implants should usually be used only once and the best time to use them is as the last implant before slaughter. However, with long fed Holsteins, begun at about 400 lbs, one might consider using CC-type implants twice. Develop your implant strategy so that the last CC-type implant is not given at less than 80 days or more than 100 days prior to slaughter. The implanting strategy will work but only if proper implanting techniques are used. Check the directions for proper implant site location in the ear.