How do farmers kill their cattle?

Culling is not to kill. Culling is to sell excess stock from the farm. A farmer would not be killing his cattle unless some are for meat or there are sick or injured cattle that need to be dispatched. A bullet through the forehead does the trick. Blatant negligence by denying proper nutrition, water and shelter to cattle will also kill them. When this happens, it would be hoped that a citation from the SPCA is ordered to seize the animals, and the state/provincial court issues it illegal for that "farmer" to own any animals for the rest of his/her life.