Last week offal and sheep skins were found dumped in Stock Rd near the Te Kura Kaupapa School in Flaxmere.
Mr Andrew said stock theft was a "major issue" in the region.
"So we don't need this as well."
He said the damage to several of the sheep was extensive, and some had crushed lower jaws which indicated the dog which attacked them was large and powerful.
"Others were found with torn legs and wounds to stomach areas."
He said it was hard to tell whether it was just one dog or several.
The similarity to the previous incidents indicated the same dog or dogs may be involved, and Mr Andrew said until they were found the threat to sheep in the area was high.
He said while dogs could travel some distance to prey on sheep he believed the dog, or dogs, responsible for Sunday night's attacks were likely to be local ones.
"They would have arrived home with a fair amount of blood on them and probably fibres of wool."
Several of the dead sheep were splattered with mud and the dogs too would have ended up with mud on them.
The farmer put the value of the sheep at about $105 a head which meant the loss would cost him more than $4200.
"It's just something we have to deal with," he said.
Mr Andrew said anyone with any information about the incidents should contact him on 831 0700.
The farmer said he was in the process of moving the remaining sheep from the block as he feared the dog, or dogs, were likely to return.
