Serial animal killers have slaughtered more than 130 animals worth tens of thousands of dollars in rural Western Bay.
The latest animal to fall victim in the campaign of violence spanning more than a decade in Whakamarama is a highland bull bashed with a sledge hammer.
Whakamarama farmer Barry Skokandich told the Bay of Plenty Times he was checking on his herd of Highland cows about two weeks ago when he came across the dead body of Napoleon, one of his two breeding bulls.
A vet who examined the half-tonne animal found it had been struck on the head with a large hammer-type weapon. The stunned animal rolled on to its back after receiving the blow, got a horn stuck in the fence, could not get up and choked to death.
"His sister (Napoleon's) was killed a month back and his mum was killed a month before that and she was pregnant," he said. "It's pretty horrific. They are tame animals."