Irish spring calving cows are traditionally vaccinated for diseases such as IBR, Lepto and BVD in the tight window between calving and breeding. This practice primarily developed because older vaccines have only 6 months duration of protection, or specific timing recommendations, which must be adhered to for protection during early to mid-pregnancy. But with the availability of more modern vaccines with 12 months proven protection it is time to reconsider vaccination timing. There are many benefits to winter vaccination compared with the challenges of vaccinating cows in Spring.
Why vaccinate in spring when you can easily switch to winter vaccination?