I am a rancher and get it straight you casterate calves, not mature Bulls. I never enjoyed it but had to do it. At the same time we vaccinated, we de horned, branded, and put steroid implants behind their ears. It was tough on the calves and I really felt for them. But they survived and grew to maturity. We calbed in the spring and usually sold the first of November. The best steers were over 750 the rungs around 400. Usually the mothers of the rungs were sold about the first of the year for calvey cow.