Two Waikato cows today learned the hard way why it's not a good idea to escape their paddock.
Waikato Senior Sergeant Andrea McBeth said the cattle were walking on a bridge on the unlit Puke Rd (SH2), at Netherton, just north of Paeroa, when they were struck by a car about 5.45am today.
One of the beasts suffered a serious leg injury so one of the attending officers had to put it down.
The other cow was put into a paddock, she said.
The driver of the car was able to get out of the vehicle and was attended to by St John Ambulance staff.