Judge Ross said, after reading the victim impact statements, it was clear the sight had been distressing.
Heads and a dead ram had been left at the scene.
Defence lawyer Mike Andrews said his client had played a lesser role in the offending and had not organised the killings or the sale of the meat.
He argued Van der Wiel's criminal history had tapered off and he was now in employment in Pahiatua.
Judge Ross said the group had acted in a pack with the purpose of gaining financially.
Debra Lee Ann Paulson who was charged with receiving the meat also pleaded guilty after her charge was amended.
She received 100 hours' community work.
Another accused, Holly Marlow, is due to be sentenced for her part later this month while two others have already been sentenced to 175 and 200 hours' community work.
- NZME