Farmer Ian Galpin had to borrow a friend's digger to carve out a hole big enough to bury 33 sheep killed by a roaming dog on his rural property.
He wants the owners of the canine to come forward and surrender it to authorities before it embarks on another killing rampage in the Ngunguru Ford Rd area, north east of Whangārei.
Galpin was devastated to find that nearly half his 76-strong flock of romney/south suffolk cross sheep had either their "throats ripped out or their faces caved in" while others drowned in a creek as they tried to flee their attacker.
When the ewes and lambs started bunching up in a corner last Thursday about 6.30pm Galpin knew something was up.
"My first thought was it was a dog chasing them," he said.