A pregnant ewe has been caught in a gin-trap after sheep rustlers targeted flocks at Auckland's Cornwall Park.
The Federated Farmers said it was "shocked, but unsurprised" by what happened, and called for tighter legislation to penalise those who carry out such crimes.
"As we're on the cusp of main lambing I was shocked that they had targeted pregnant ewes, but they [the rustlers] probably do not care," Rick Powdrell, Federated Farmers rural security spokesman said.
"The current law offers no deterrent. We've seen sob stories being rewarded with community service and a few dollars in reparations. This doesn't reflect the gravity of the crime or the likely suffering of an animal being slaughtered by a rank amateur."
He described it as "bloody dangerous and stupid".