This paper describes two infections with Clostridium tetani (C. tetani). One outbreak occurred after dehorningof calves, the second infection happened after ear tagging of a goat. In the first case 3 young HolsteinFriesian calves showed generalized stiffness, severe lock-jaw and bloat two weeks after dehorning. The thermaldehorning wounds were identified as the infection sites of C. tetani by bacterial culture and PCR. The secondcase was a three-year old male castrated goat, with generalized stiffness. The animal had been ear taggedone week prior to the onset of the symptoms. C. tetani could be cultured from pus on the ear tag.Treatment was attempted in two calves and the goat. Wounds were debrided and disinfected, penicillin andanti-tetanus serum were administered and polyionic perfusions provided. In addition, the goat was vaccinatedagainst tetanus. The goat and one calf fully recovered after 36 and 8 days respectively. To the authors’ knowledgea tetanus outbreak in association with thermal dehorning has not been described previously. Also eartagging as a possible cause for C. tetani infection has not been described in goats.