Bright Raven
Well-known member
Katpau":276c5qnr said:I also use Vira Shield and Covexin 8, except that I use the Vira Shield 6 +VL5 HB. I give the Vira Shield twice per year because my Vet tells me it is only good for about 6 months. We do have a problem with late term abortion (250 days+ gestation) and the occasional weak calf in spite of culling the opens. Tests have eliminated many causes but could not rule out Lepto. Since you are already vaccinating with a the Novartis product Vira Shield, I suggest you just change to the one that includes HB. When we first began using it, my Vet said it was the only product that had the HB strain. That may have changed now.
Most drug companies, in fact, maybe all of them, offer a Hardjo Bovis vaccine.