Some examples of conditions that may contribute to calves being at high risk of developing BRD include, but are not limited to, the following:
ransportation with animals from two or more farm origins.
An extended transport time with few to no rest stops.
An environmental temperature change of ≥30°F during transportation.
A ≥30°F range in temperature fluctuation within a 24-hour period.
Exposure to wet or cold weather conditions.
Excessive shrink (more than would be expected with a normal load of cattle).
Stressful arrival processing procedures (e.g., castration or dehorning).
Exposure within the prior 72 hours to animals showing clinical signs of BRD.