However, if heifer calves have been implanted only once early In the nursing period, the influence upon future conception rate may be small. When and How to Wean Calves should be weaned when they are 6-8 months old. The best way to wean is to remove the calves from their dams and keep them out of sight of one another. If calves were creep fed, continue their creep rations during the weaning period. Internal and External Parasite Control Treat calves promptly when infestations of either internal or external parasites are found, because parasites reduce gains and even cause death of the animal if untreated.
Worms are often responsible for poor performance, rough hair coat and diarrhea in calves.
Worm eggs are passed in feces and ingested by the calf. Many animals concentrated in a small area or on very short pastures are conditions conducive to development of internal parasite problems. Since different chemicals are needed to treat different kinds of worms effectively, consult a veterinarian for proper diagnosis and recommended treatment. Lice can be controlled effectively by spraying or by using pour-on insecticides. Bovine Respiratory Disease Control Preconditioning is a way of preparing calves destined for the feedlot to better withstand the stresses associated with shipping, movement through market channels and getting started on feed.