For meat to be Kosher, the animal must be slaughtered in a particular way, so the Rabbi in a Kosher abattoir is a specially trained religious slaughterer. The animal must be killed so it feels little pain. A very sharp knife is used to cut the oesophagus, the trachea, carotid arteries and jugular veins in one smooth action. There must be no pause during the action nor excessive pressure on the blade. Failure to meet these specific requirements renders the animal unkosher.