Bulls do not produce quality semen overnight!!! The process of semen production and maturation takes six weeks, so if your bulls are not in good order by now their ability to produce high quality semen and deliver good conception rates may be compromised on dairy or beef properties where bulls go out in October / November. Later mating herds have a little more time to ensure:
Bulls are well fed and in good order.
Mineral deficiencies, especially selenium and copper, have been rectified.
BVD boosters have been given.
Semen testing has been carried out especially for yearling bulls and bulls with previous health or condition issues.