We have a small herd of about 60 cows. During a one-month period, four cows aborted. They were at least six months along. We have a closed herd, so the only thing we vaccinate for is blackleg. What could be causing this, and what should we do to prevent future problems?
Diagnosing the cause of abortion in cows is always tough. Abortions can be caused by bacteria, viruses, protozoans, toxins in feed or pastures, genetic defects, heat and stress. To further complicate things, the event leading to an abortion ...