Soon after birth If dehorning is required, it is much less stressful for a baby calf than for an older one. Use a dehorning scoop, dehorning paste, or a dehorning iron. Make sure calves have access to free choice minerals from birth through weaning.
Trace minerals can affect a calf's immune response.
Dehorn, if not done earlier. Vaccines used at this time should be safe for pregnant cows, since calves will still be nursing their dams, and some vaccines may cause virus shedding by vaccinated calves. Vaccinate for Haemophilus somnus if recommended by your veterinarian. Wean calves into an area where they can be observed closely for at least 4 weeks. This area should be close to good working facilities in case any calves begin to show signs of sickness and need to be treated.