Bull Management: With bulls still working in mid-spring calving herds, it’s important to be vigilant for repeats that could signal a change in the bull’s fertility status. There will always be a number of problem cows that don’t hold to first service in any herd but a high number of repeats needs investigation. If in doubt, get the bull fertility tested. Watch out for signs of lameness or hurts in bulls and treat early if there are any signs. A lame bull will be sub-fertile and won’t put all cows in calf.