A driver who ploughed into a rogue herd of cows early this morning escaped unhurt, but six cows died - including two that had to be put down by police.
The accident happened around 12.20am on Karaka Rd in Pukekohe, about 300m south of the Pukekohe Golf Club, according to a police spokeswoman.
The driver encountered some 20 cows that had escaped into the road, hitting at least six of them, she said.
The ensuing carnage blocked both sides of the road.
The driver - the only occupant of the car - was uninjured.