While research shows some benefit to vaccinating very young calves, it’s usually best to wait a while, even in calves that were shorted on colostrum.
January 26, 2017
“In the 2-week old calf, there are two things you need to be concerned about. One is age, the other is colostrum intake. Typically, even in a calf that got no colostrum [and no maternal antibodies to interfere with building its own immunity], the response for making antibodies [when vaccinated early] is not great under 3 weeks of age. If they have higher levels of maternal antibodies than the older calves, they also may not respond [to vaccination],” says Chris Chase, Department of Veterinary and Biomedical Sciences, South Dakota State University.
“We did a study in very young calves [2 or 3 days of age]. We vaccinated them at that age, then came back seven months later [weaning time] and challenged them. From a statistical standpoint it worked, but from a production standpoint I don’t think producers would be very excited about it because in the control group, 80% of them got sick [when challenged] and in the vaccinated group, 20% of them got sick. If a person waits until those calves are 3 to 4 weeks of age, less than 5% of the vaccinates would get sick,” he explains.