Still our "maar hanne" way of slaughtering animal is the most human way to kill the animal. The head is seperated in a fraction of a second and all the vains between the brain and the body is seperated at the fraction of a second. The animal feels least amount of pain that what Muslims and Christians do during animals slaughtering. 

There used to be a saying that if the head is not seperated in one strike the animal was supposed to be impure. They encouraged animal to be seperated in one strike.