Careful, quiet handling of cattle will help improve productivity. Stress imposed by handling and transport can have detrimental effects on weight gain, rumen function, reproductive function, and the immune system. Quiet handling reduces stress-related meat quality problems such as dark cutters. The amount of stress imposed on an animal is an interaction of previous experience, tameness and genetics. How quiet your cattle is at least partially a function of how they are worked.
Cattle can remember rough handling.
While most cattle will calm down when they are handled quietly, a small percentage of them may remain excited. Highly excitable cattle should be culled. To accurately cull for temperament, there should be a minimum of two observations. More than one evaluation is required to avoid culling a good animal that become excited because an animal next to it becomes agitated. If an animal becomes very excited, 20-30 minutes is required for its heart rate to return to normal.