Breeding Soundness Exam
Your bulls play an important role in your herd’s genetics. You should conduct a breeding soundness exam on them every year before you turn them out with the cows. It is recommended you conduct these exams 60 days prior to turn out.
These tests are used to determine if your bulls are fertile and able to breed your cows. The veterinarian conducting this will take a sample to see how his sperm is doing. It will also include measuring the scrotal circumference to ensure that he has plenty.
One thing to consider is that your basic exam does not include Trich testing. If you are in an area where this is a problem then bring it up to your vet that you would like to include this in the exam.
I go into a little more detail about breeding soundness exams here.
Pre-Breeding Vaccinations
Protection against any possible diseases in your herd begins with your cows. A healthy cow means there is a better chance of having a healthy calf.
You should administer the vaccinations 30 days prior to the start of your breeding season in order for them to be most effective. Since different areas have different risks you should consult with your local vet to know which vaccines you will need to give.
Parasite and fly control
According to research by Iowa State University not controlling parasites could affect your breakeven negatively by 30%. Controlling these problems have been shown to be the most effective way to boost calf weaning weights.
Since your calves are still nursing you could get away with treating just the cow. Any resistance that she has will be passed along to her offspring. That being said, it is still beneficial though to treat the calves weighing between 200 to 400lbs.
Vaccinate calves
Since you will be having them going through the working pens now is the time to castrate and dehorn them too. New Mexico State has some valuable guidelines for what to do with calves at this time.