Amy Stanton, PhD, University of Guelph, says young dairy calves that have experienced a bovine respiratory disease (BRD) episode can have long-term economic effects such as:
- Calves with BRD following movement to group housing have lower average daily gain than their healthy herdmates for up to four months after first treatment. In a study, at 1 year of age, BRD calves weighed 30 pounds less than their healthy herdmates.
- BRD decreases survival to first calving both through mortality and increased risk of culling.
- It’s been shown for over 20 years that heifers that have had BRD as a calf and do calve, are more likely to calve later in life (Waltner-Toews, et al, 1986; Correa et al, 1988). This is still occurring, despite changes in disease and cattle management, as shown in Stanton’s current research.
Read the full article on BRD and Sickness Behaviors in Calves here.