- We recommend that calves be given their first dose at 3-4 months of age followed by the first booster 3-4 weeks later.
- At 13-14 months of age (pre-mating) heifers should receive a booster (if yearling heifers have not been vaccinated as calves they should receive two doses at this point).
- Cows should receive an annual booster pre-mating. This should be ideally done at least 10 days before the planned start of mating each year.
Remember to also ensure that bulls are tested for BVD and are vaccinated before coming onto your property.