Pfizer sent out a pamphlet recently that is pushing the idea of using MLV vacines, now of course that limits the window of the vacination program for cows to the time period that that they are open, prior to breeding, as these vacines are not safe for pregnant cattle, or cattle that are still allowing calves to suck... Small window. But they are saying that their products give better and longer protection against the various badies out there. If , like us, you keep a bull in pasture all yr round, it makes things very difficult if not nearly impossible to take on such a program. But, if you have a yearly breeding program, vacinations just prior to breeding seems the way to go.
I called and spoke to one of the in-house vets at the company and he concurred with the above. he also spoke highly of these new 'vacines' for newborn calves that contain hyperimmunized serum for BVD, Ecoli, Salm, P13, etc. Our vet has had us trying these out, and so far so good. I am not sure that we will get complete protection, but it does seem that the symptoms are much less pronounced when they do get ill.
Has anyone else started using any of these serums that have just come out? :?: