Antibiotic : enrofloxacin 2.5 mg /kg /day I.M. for 5/ 7 days; and anti-inflammatory analgesic : ketoprofen, Findol 10%, 0.3 ml/10kg/die i.m. for 3 /5 days. If necessary will be given also tramadol, 2-4 mg /kg/day in the first 2 /3 days post-intervention . The surgical wound will be checked daily.