A Canterbury farm is devastated after 500 of their dairy cows worth around $1 million have gone missing.
Farm administrator Pennie Saunders posted on Facebook to try and track down the missing herd.
"We have had approximately 500 cows stolen from our large dairy farm in the Ashburton area."
Saunders told the Herald the "phenomenal" theft was first noticed in late August but could have taken place earlier.
"It's significant, it's huge, there's no joking about it. We're now focused on coming up with a farm management plan on how to manage it, to be able to cope.