Almost half the heard of 1300 cows cam up missing over night. <br /> <br />Aug 29, 2016 – Workers on an Ashburton dairy farm have been left scratching their heads after 500 cows were discovered missing from their herd. <br />Pennie Saunders, an administrator for the farm, said they noticed last week that “things weren’t adding up as cows were coming back in”.