It is not known whether or to what degree local anaesthesia with lidocaine reduces pain associated with castration in neonatal calves and whether bupivicaine provides longer analgesia than lidocaine. Early castration is commonly practiced in Switzerland, as in other countries because small calves are easier to catch and to restrain; 49.3% of bull calves are castrated within the first week and 66.1% within the first 4 weeks of life