Isolate infected bulls from your herd and treat them according to veterinary recommendations. Vaccination is another weapon against these diseases. Again, consult your veterinarian for specific recommendations on type and timing of vaccination. A BSE does not guarantee pregnant cows, but it can eliminate bulls that have little or no chance of success. Bulls are often used to counter heat detection difficulties.
Bulls generally do a good job of heat detection, but a miserable job of record-keeping.
Heat detection aids help identify cows that a bull has bred. This lets you make more informed cow management decisions such as when to dry off. Hand mating has been abandoned in most herds because of the extra effort required. Heat detection is important when breeding cows this way, but breeding dates are much more precise. If hand mating is used, design facilities so that cow and bull can be separated without subjecting the handler to danger from the bull.